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Google Algorithm Updates

Was there a Google Update?

You may be wondering if there was a recent Google update or if a past Google update such as Penguin, Panda, Possum, or Fred impacted your website’s rankings and traffic. Our teams keep an eye on the Google landscape and Google SERP ecosystem for our enterprise 世界杯投注地址 and local 世界杯投注地址 clients.

Google Update History

Below you will find a list of Google updates to help you identify if your traffic fluctuation coincided with a recent Google Algorithm change or if your website was manually or algorithmically penalized due to poor 世界杯投注地址 strategies. The list includes both confirmed and unconfirmed algorithm updates that impacted rankings to help you answer the questions, “When did Google change its search algorithm?” and/or “Was there a Google update?”.

6/26/2022Google 15MB Page CrawlGoogle announced that it will only crawl, and utilize the first 15MB of a page for ranking purposes. Anything past 15MB will be ignored.
5/25/2022May 2022 Core UpdateGoogle has started the rollout of a new broad core update. It will take 1-2 weeks to be fully rolled out.
5/23/2022Improved product reviews in SearchGoogle has launched an update on product reviews shown in Search. The update includes more in-depth details, visuals, and comparisons with competitor products.
1/24/2022Google Algorithm updateUnconfirmed Google Search ranking algorithm update that seemed to touch down on Thursday, February 24th. This is most likely unrelated to the desktop version of the page experience update that started on Thursday, February 22nd.
1/22/2022Google Page Experience Algorithm updateGoolge is releasing its page experience update to the desktop results.
1/19/2022Google Pirate Algorithm updateGoogle strengthens The Pirate (DMCA) Penalty Algorithm. We have developed a "demotion signal" for Google Search that causes sites for which we have received a large number of valid removal notices to appear much lower in search results.
1/19/2022Google Algorithm updateIt seems we are seeing again signs of another Google search ranking algorithm update occurring yesterday and today, January 19th and 20th. These updates are unrelated to crawl spike activity.
1/14/2022Google Algorithm updateFriday and Saturday, January 14th and 15th there may have been another unconfirmed Google search ranking algorithm update. This comes a few days after the unconfirmed January 11th update.
11/30/2021Google Local Algorithm updateGoogle said that this local update began November 30th and ran through December 8th. "It involved a rebalancing of various factors we consider in generating local search results
11/18/2021Google Core Algorithm updateGoogle announced the rollout of the next Core Algorithm update, which began on November 17th.
11/03/2021November Anti-Spam UpdateGoogle has announced the release of a new version of its anti-spam algorithm. As with the previous anti-spam updates, it is mainly targeting low-quality sites that trick users into providing personal information or installing malware.
10/24/2021Signs of a Huge Google UpdateExtraordinary volatility in the SERPs over the weekend. Usually, this is associated with a Google core algorithm update; however, there was no official announcement.
10/17/2021Google Replaces Title Tags with H1 for Some PagesGoogle has confirmed that they now more frequently use the page’s H1 tag to generate the titles that are shown in search results.
9/24/2021Google UpdatePossible big Google Search Ranking Algorithm update on September 24th and 25th.
9/15/2021Google UpdateThere looks to be a Google algorithm update rolling out between the 10th to 15th of September 2021 which is causing widespread fluctuations in the Google search results.
9/2/2021Update CompletedGoogle confirmed that it completed the page experience update rollout today.
8/25/2021Google’s New Page Title UpdateGoogle announced a new system of generating title tags for web pages.
7/26/2021Link Spam UpdateInformation in Google’s announcement suggests an emphasis on targeting links from sponsored content, guest posts, and affiliate content. Here’s what Google recommends for each type of link: Affiliate links: Google asks sites participating in affiliate programs to qualify these links with rel=“sponsored”, regardless of whether these links were created manually or dynamically. Links from sponsored posts: Links that are advertisements or paid placements (commonly called paid links) are to be marked up with the rel=“sponsored” value. Links from guest posts: Links from guest posts are to be marked up with the rel=“nofollow” value.
7/2/2021Continuation of the June 3 Google Core UpdateGoogle announced the start of the rollout of another Core update that includes the changes originally planned for the previous core (June) update.
6/23/2021Anti-spam Update 2The second stage of the anti-spam update targeting mainly malicious websites that trick users into giving away their personal data or installing malware.
6/23/2021Anti-spam UpdateGoogle has announced a release of an anti-spam update aimed at removing spam websites from SERPs that trick users into providing personal information or installing malware.
6/16/2021Google Experience Update StartsThe page experience update is now slowly rolling out. While the update is designed to highlight pages that offer great user experiences, page experience remains one of many factors Google takes into account.
6/3/2021Google Core UpdateGoogle has announced the release of a core algorithm update. The impact of these updates will not be broad and most websites will not notice it.
5/23/2021Peak SERP Volatility in MayThere were several potential Google updates in May. However, the most intense shake-up of search results happened around May 23rd.
5/1/2021Google Review Update RevisionDetails suggest that it may be a further revision of an earlier update focused on product reviews and product review websites, but Google refused to comment.
4/10/2021Google Review UpdateAnnounced by Google, this algorithm update is aimed at promoting in-depth reviews over superficial reviews, or those that are generic.
2/17/2021Possible Google UpdateThere’re constant and massive movement in the Google search results, suggesting a possible algorithm update.
2/10/2021Google Passage Ranking UpdateGoogle released their passage ranking algorithm. It should help longer articles rank for the different topics in different parts of their text.
12/03/2020December 2020 Update ConfirmedGoogle has confirmed the release of a broad core algorithm update on December 3. The impact seems to have been significant, but no specific changes have been revealed by Google.
11/17/2020Possible Google UpdateThere has been evidence of a regular unannounced Google Update happening on November 17 and 18. Webmasters have reported significant shifts in rankings.
10/04/2020Possible Google UpdateThere’re constant volatility in the Google search results, suggesting an algorithm update.
9/23/2020Possible Google UpdateIncreased volatility in search results were seen.
9/16/2020Possible Google UpdateIncreased volatility in search results were seen.
8/17/2020Possible Google UpdateIncreased volatility in search results were seen on August 15th and August 16th.
7/24/2020Signs of a possible Google UpdateIncreased volatility in search results were seen around July 24. Several webmasters also noticed changes in traffic and positions.
6/23/2020Signs of a Rollback of May Core UpdateThere are reports that this may be a rollback of the core Google update from May.
6/10/2020Possible Google UpdateIncreased volatility in search results. No official statement from Google has been made regarding this potential update.
5/6/2020Google UpdateGoogle has announced a core algorithm update.
5/5/2020Possible Google UpdateThere were big ranking swings across all major categories today. This is the first major shakeup we have seen in over a month.
3/24/2020Possible Google UpdateAround March 24th the signs of regular Google Update appeared. Webmasters started talking about the sudden shifts in rankings and traffic.
3/21/2020News Website UpdatesThere are big shifts happening in the news category. This is likely due to the need for trusted content about the COVID-19 (Coronavirus) being pushed to the top of the results.
3/1/2020Nofollow Being Used As A HintGoogle has officially announced it will no longer treat the nofollow attribute as a directive to ignore links as they have done over the past decade. They sometimes will use those links for crawling and indexing purposes.
2/14/2020Google Says No UpdateOver the last 4 days there has been big swings in rankings. However, Google claims there was no update that happened. This is baffling.
2/11/2020Massive Update Happing?Over the last 4 days there has been big swings in rankings. It is still unclear whether there is a pattern, but the chatter is big enough to hope for some comment from Google.
2/04/2020Update Rolling Out?Webmasters and tracking tools have reported an increased amount of shuffling in Google search results, which looks like a usual unannounced algorithm update.
1/23/2020Google Featured Snippet UpdateIn an effort to clean up the duplication in search result listings, Google has announced that if a URL gets into a Featured Snippet, it will no longer be repeated on the first page of regular search results.
1/14/2020Google Core UpdateGoogle has recently started to pre-announce bigger core updates. This one falls in line with the previous core updates, which are not aimed at particular issues and can impact anyone.
1/07/2020New Year New Ranking FluctuationsEarly into 2020 we already see signs of a first unconfirmed Google Update, with all the regular symptoms.
12/11/2019Significant Shifts in RankingsWebmaster reports seem to confirm that a significant update is happening, but no clear pattern has been discovered so far.
12/04/2019Google Update Signals in DecemberSensor has reported a significant uptick in SERP volatility that can be attributed to a yet unannounced algorithm update.
11/22/2019Higher Than Average SERP volatilityReports of increased volatility in Google search for the whole week, with no definitive date or clear pattern. This could mean a series of unrelated small updates or just a prolonged rollout of a big one.
11/6/2019Local Search Proximity UpdateA significant update had hit the local rankings of many businesses. The most likely explanations is the increase of the importance of the proximity signal
10/19/2019Bert UpdateGoogle announced it is releasing an update called BERT - dedicated to improving the understanding of queries formulated in a natural language.
9/25/2019Google UpdateGoogle released an early warning that a core algorithm update is coming on September 25.
9/13/2019Google Updates Number of Reviews They Show in SERPsGoogle has announced that it is now applying stricter rules for showing reviews in search results. The most significant change is that reviews that are only present on the website of the business itself will be ignored.
9/13/2019Friday the 13th Possible UpdateFriday the 13th was scary for many webmasters, as search results began to change and rankings shifted. This could be a sign of a Google core algorithm update.
9/10/2019Google Update For Nofollow TagsGoogle representatives have announced that they are changing the way they interpret the nofollow link attribute. Previously, links with nofollow were always ignored for ranking purposes. Now, Google will decide for itself whether to count this link or not. Google has also introduced two additional attributes for user-generated content and sponsored content.
8/30/2019Possible UpdateAnother wave of changes hit the search rankings, and as usual, there were no comments from Google.
8/8/2019Google Issue with Indexing New ContentFor a second time this year, Google is experiencing problems with indexing fresh content on the web. If your traffic depends a lot on new content (e.g. a news site), you may see a decline in it these days.
7/18/2019Google UpdateThe SERPs are being rocked by an unconfirmed update - some naming it the Maverick Update. This one is the most significant so far on the Sensor scale.
7/13/2019Regular Google Unannounced UpdateWebmaster forums and the sensors indicate that a usual unannounced update happened around July 12-13.
6/7/2019Domain Diversity UpdateGoogle has rolled out an update to improve the situation when a single domain dominates search results for a specific query.
6/4/2019Pre-Announced Google Core UpdateGoogle has announced that it will be releasing a core ranking algorithm update around June 3–4. According to Google, there is nothing special about this update, and there are no particular things to watch out for or try to fix
5/22/2019Search Results Shake Up. Another Google Indexing Bug SuspectedGoogle has confirmed another problem with indexing — this time related to new content causing shifts in rankings. It has yet to be determined if this is cause and effect.
4/27/2019Update To Fix The De-indexingAfter Google fixed its earlier problem with de-indexing some pages, its regular pattern of at least one unannounced update per month seems to have resumed. On April 27, the sensor detected significant shifts in rankings, and many webmasters confirmed that they saw changes in their traffic.
4/7/2019Google Indexation GlitchGoogle De-indexing Problem Causes Shifts in Rankings
3/12/19Florida 2 Core Algo UpdateGoogle has confirmed that a glitch in their algorithm caused some pages to become de-indexed and drop from the search results.
3/1/19Google UpdateThe Sensor has been detecting an increase in SERP fluctuations. A lot of webmasters have also noticed shifts in rankings and have reported a significant Google Update.
2/22/19Volatility Spikes Continue Through FebruaryFebruary turned out to be a very interesting month in terms of SERP changes. Statistics point to a series of small Google algorithm updates, with peaks on February 7, 12 and 22. Although none of these updates were commented upon by Google officials, webmasters agree that updates did occur.
2/7/19Another Google UpdateIt seems that another unconfirmed Google update happened on February 7.
1/9/19Google UpdateBig swings in rankings across almost all categories.
1/7/19First Google Update of the YearThe New Year begins with what seems to be a monthly Update. Webmasters have reported that a substantial update started around January 7.
1/6/19Google UpdateGoogle results are shaking up heavily for news related content. This may be a sign of a possible algorithm change.
12/21/18Google UpdateGoogle results are shaking up heavily for the news, sports, and entertainment categories. This may be a sign of a possible algorithm change.
12/16/18Google UpdateGoogle results are shaking up heavily for the news, and sports categories. This may be a sign of a possible algorithm change.
11/30/2018Google UpdateThere’re constant and massive tremors on Google search results, suggesting a significant algorithm update.
11/18/2018Google UpdateA higher than normal search volatility points to another unannounced Google algorithm update. This one seems to have been focused on the healthcare and finance industries.
11/1/2018Halloween UpdateHalloween Ranking Update - Many webmasters have reported scary shifts in search results.
10/9/2018Google UpdateThese last few months have seen some turbulence in the SERPs, with reports of shifts coming almost every week.
9/27/18Birthday UpdateGoogle confirmed they released a minor algorithm update on the company’s anniversary, September 27.
9/11/18Google UpdateHigh volatility combined with webmaster reports indicate another "silent" Google update.
8/1/18Search Quality UpdateGoogle confirmed that it has released a major search quality update to provide more relevant results.
7/22/18Google UpdateSearch results noticeably shifted, indicating that a regular Google Update is underway.
7/9/18Mobile Search Speed UpdatePage load speed is now confirmed ranking factor for mobile search.
6/16/18Signs of a Mid-June UpdateThe sensors showed a spike in volatility, and webmasters across the world reported shifts in traffic and positions.
5/24/18Google UpdateThe sensors detected a sudden volatility spike suggesting that Google rolled out another update.
4/17/18Core Algo UpdateGoogle confirmed that it released a core algorithm update.
3/26/18Mobile-First Indexing RolloutGoogle officially announced that mobile-first indexing is starting to roll out.
3/23/18Continuing Update SignalsEither a core update confirmed earlier this month continues to reverberate, or there was another update.
3/9/18Core Algo UpdateGoogle has confirmed that they released a core ranking algorithm update.
3/2/18Signs of an UpdateThere is not a complete consensus, though, and the update might be niche-specific.
2/21/18Significant UpdateWith the sensors having detected an unprecedented quake, it is clear that something happened.
1/23/18Series of Minor UpdatesAll signs look more like a series of smaller changes.
1/6/18Google Algo TweaksThe earlier changes that dealt with keyword permutations, PBNs and celebrity sites, were fine-tuned by Google.
12/25/17Spammy LinksThis update seems to target spammy link techniques, such as PBNs (Private Blog Networks).
12/13/17Pre-holidays UpdateAnalysis suggests that the update hit at least two website categories: - Sites with too many landing pages targeting KW permutations - Sites with too many ads or thin content
11/15/17Google UpdatePreliminary analysis of ranking fluctuations show that sites with lots of ads and thin content were affected.
10/8/17Columbus Day Weekend UpdateSensors reported high volatility and webmasters were talking about position shifts.
9/26/17SERPs Shuffle ContinuesAfter two significant volatility spikes, monitoring tools again reported that there were signs of a possible Google Update.
9/16/17Google UpdateMany users reported sudden shifts in their domain’s positions.
9/8/17Rankings UpdateIn a somewhat unusual pattern, webmasters began reporting shifts in positions and traffic almost two days earlier.
9/1/17AMP Pages / Featured SnippetGoogle pushed out an update that increases the page’s chances of getting into a Featured Snippet in mobile search if it is AMP-powered.
8/22/17Hawk Local Algorithm UpdateGoogle released a refined Possum algorithm update, dubbed "Hawk," which returned the majority of those businesses to the local pack. Nevertheless, businesses that share the same building can still be filtered out.
8/19/17Quality UpdateAnother quality update has been rolled out, penalizing sites with bad user experience, such as: - Thin content with lots of ads - Broken links and/or Flash - Low relevance to the query+C24
7/8/17Signs of a Google UpdateSensors and other tracking tools have shown increased volatility in Google search results over the weekend.
6/24/17Significant Google UpdateMany webmasters have confirmed that they’ve seen traffic changes. Despite all efforts, this analysis has revealed no patterns for the update.
6/14/17Small Google UpdateThere are some reports from webmasters who experienced traffic drops and rises.
5/17/17Weeklong UpdateAlthough this update may be caused by the recent drop of the Featured Snippet link from search results, it is not enough to completely explain the shifts.
4/4/17Small Google UpdateSensors report an increase in the amount of ads being shown, but there is no evidence that it is related to the update.
3/30/17Google tappable shortcuts on mobile webGoogle announced that a new version of its search app will now provide instant access to information related to sports, cafes and weather.
3/8/17’Fred’ UpdateGoogle confirmed that they released an update that target websites with "quality issues."
3/6/17More Top Stories in Related PicksGoogle added a new feature that allows users to see more AMPs in search results.
2/7/17Google Algorithm UpdateMany webmasters and tracking tools, including sensors, reported significant rankings changes in Google search results.
2/3/17Google Japan Quality PenaltyGoogle Japan has announced that they rolled out an update aimed at lowering rankings of websites that don’t bring high quality content to their users.
2/1/17Update Targeting PBNsThere seems to be a Google update penalizing PBNs (Private Blog Networks).
1/24/17Symptoms of a Google UpdateAlthough many tracking tools and webmasters reported multiple ranking and traffic changes, Google has not confirmed it released an update.
1/16/17MLK Day UpdateGoogle algorithm tracking tools and a webmasters noticed signs of a Google Update.
1/10/17Intrusive Interstitials Mobile PenaltyGoogle announced it will be penalizing mobile pages with interstitials. Including: - Pop-ups that cover the main content - Standalone interstitial that needs to be dismissed to access the main content - Hiding the main content below the fold
12/15/16Google Update SignalsThis may be a major Google update or continuing testing of mobile-first index, which was rolled out a month ago.
12/7/16Desktop Search UI UpdateGoogle updated the UI of its desktop search, bringing it closer to mobile UI.
11/30/16Google punish sites for bad UXThere was significant changes in traffic, particularly those with intrusive ads, mobile pop-ups and other bad user experience practices.
11/23/16AMP Carousels for Hotel ListingsGoogle now shows a new AMP Carousel for hotel listings in mobile search results.
11/18/16Reversal of a previous UpdatePart of the changes done by previous the update are reported to be reversed.
11/10/16Mobile UpdateSymptoms indicate testing of mobile-first index.
11/4/16Mobile-First Index ExperimentGoogle announced that they’ve launched an experiment to use mobile version of the website as primary source of content.
10/24/16Signs of a Google updateSeveral reported rankings changes in Google search results.
10/13/16Penguin 4.0 rollout completeGoogle confirmed that the rollout of Penguin 4.0 - which started on September 23rd - is completed.
10/5/16Google UpdateMay be a change in recent Penguin 4.0 or an unrelated algorithm update
9/28/16Penguin 4.0 Recoveries start to roll outPenguin 4.0 penalty recoveries started to roll out.
9/23/16Penguin 4.0 launchGoogle officially launched Penguin 4.0.
9/20/16AMPs indexed in organic searchGoogle has officially rolled out Accelerated Mobile Pages in organic search results around the world.
9/13/16Tweaks to previous weekend Google UpdateRanking fluctuations could be a sign that Google is tweaking the algorithm, but no official confirmation has been received.
9/2/16Google Core Algo WeekendUpdateChanges in core and local web search results have been widely reported by webmasters and ranking tools.
9/1/16Possum local algorithm launch1. Businesses that fall outside of the physical city limits saw a huge spike in ranking. 2. Google is now filtering based on address and affiliation. 3. The physical location of the searcher is more important than it was before. 4. Search results vary more based on slight variations of the keyword searched. 5. The local filter seems to be running more independently from the organic filter.
8/12/16Boost of HTTPS as Ranking SignalSources report increase of HTTPS sites in top results.
8/2/16Reversal of a previous UpdateThere is a possibility that Google reversed the changed happened a week ago.
7/26/16Possible Google UpdateWebmasters and tracking tools reported increased volatility in Google rankings.
6/26/16Evidence of an UpdateEvidence collected by a researcher suggests that there was a Google Update in June.
5/12/16Mobile Friendly BoostGoogle representatives announce completion of an update which improves positions of mobile-friendly websites.
1/16/16Burj Khalifa UpdateAnother core algorithm update confirmed by Google after significant fluctuations on the weekend.
1/8/16Google Core UpdateGoogle confirmed that they rolled out a core ranking algorithm update that took more than a week to complete.
10/26/15RankBrain IntroductionGoogle announced the usage of machine-learning algorithm called RankBrain to sort search results.
6/22/15Panda 4.2Google announced that it launched a Panda refresh, but it may take months to fully roll out.
5/3/15The Quality UpdateGoogle confirmed it made changes to its core ranking algorithm in terms of how quality signals are processed.
4/22/15Mobile Friendly UpdateGoogle began the global rollout of the mobile-friendly update that impacts search rankings on mobile devices only.
2/5/15Unnamed UpdateMultiple SERP-trackers and many webmasters reported major flux in Google Google search results.
12/22/14Pigeon ExpandsThe major local algorithm update, Pigeon, expanded to the United Kingdom, Canada, and Australia.
11/13/14Google Drops Carousel for Local ListingsGoogle replaced its horizontal Carousel display of local search results by a 3-pack of organic listings.
10/24/14Google Pirate UpdateGoogle announced an update to its filtering system.
10/23/14Panda 4.1Google announced that the latest version of its Panda Update has been released
10/17/14Penguin 3.0Google updated their Penguin algorithm with version 3.0.
10/2/14In the News’ BoxGoogle made a change in the display of the News-box results, and expanded the news websites links set
8/24/14Authorship RemovedJohn Mueller announced that Google will completely stop showing authorship information in search results.
8/6/14HTTPS as rank signalGoogle announced their decision to start using HTTPS as a ranking signal.
7/24/14PigeonGoogle released a new local algorithm to provide more accurate local search results that are tied more closely to traditional ranking signals.
6/12/14Payday Loan 3.0The third version of PayDay Loan algorithm is officially announced, specifically targeting "very spammy queries"
5/19/14Panda 4.0Matt Cutts announced the release of a major Panda update, affecting different languages to different degrees.
5/16/14Payday Loan 2.0Google confirmed they have released a new algorithm update to their Payday Loan Algorithm update over this weekend.
3/24/14Unnamed UpdateMajor algorithm flux trackers and sites reported ranking changes.
2/6/14Top Heavy 3Google has released a refresh of its Page Layout Algorithm.
10/4/13Penguin 2.1The fifth confirmed release of Google’s "Penguin" spam fighting algorithm went live.
8/20/13HummingbirdGoogle announced they rolled out the update Humminbird one month ago, and it is an update of its core ranking algorithm
7/27/13Multi-Week UpdateA series of updates confirmed by Google.
5/22/13Penguin 2.0Google announced the new Penguin 2.0 update.
3/14/13Panda #25Final update before incorporation of Panda into the main algorithm.
1/22/13Panda #24Panda update announce by Google
12/21/12Panda #23Panda update announce by Google
12/4/12Knowledge Graph ExpansionGoogle added Knowledge Graph functionality to non-English queries, including Spanish, French, German, Portuguese, Japanese, Russian, and Italian.
11/21/12Panda #22Google confirmed the 22nd Panda update, which appears to have been data-only.
11/5/12Panda #21 Google rolled out their 21st Panda update, roughly 5-1/2 weeks after Panda #20.
10/9/12Page Layout #2 Google announced an update to its original page layout algorithm change back in January, which targeted pages with too many ads above the fold.
10/5/12Penguin #3 After suggesting the next Penguin update would be major, Google released a minor Penguin data update, impacting "0.3% of queries".
9/27/12Panda #20 Overlapping the EMD update, a fairly major Panda update (algo + data) rolled out, officially affecting 2.4% of queries.
9/27/12Exact-Match Domain (EMD) Update Google announced a change in the way it was handling exact-match domains (EMDs) resulting in a devaluation of those type of domains.
9/18/12Panda 3.9.2Google rolled out another Panda refresh, which appears to have been data-only.
8/20/12Panda 3.9.1Google rolled out yet another Panda data update, but the impact seemed to be fairly small.
8/14/127-Result SERPsGoogle made a significant change to the Top 10, limiting it to 7 results for many queries.
8/10/12DMCA Penalty ("Pirate")Google announced that they would start penalizing sites with repeat copyright violations, probably via DMCA takedown requests. Timing was stated as "starting next week" (8/13?).
7/24/12Panda 3.9Google rolled out a new Panda update. Rankings fluctuated for 5-6 days, although no single day was high enough to stand out. Google claimed ~1% of queries were impacted.
7/19/12Link WarningsIn a repeat of March/April, Google sent out a large number of unnatural link warnings via Google Webmaster Tools.
6/25/12Panda 3.8Google rolled out another Panda data refresh, but this appeared to be data only.
6/8/12Panda 3.7Google rolled out yet another Panda data update, claiming that less than 1% of queries were affect.
5/25/12Penguin 1.1Google rolled out its first targeted data update after the "Penguin" algorithm update.
5/16/12Knowledge GraphGoogle started rolling out "Knowledge Graph", a SERP-integrated display providing supplemental object about certain people, places, and things.
4/27/12Panda 3.6Google rolled out yet another Panda data update, and it seemed that the impact was relatively small.
4/24/12PenguinGoogle rolled out the "Webspam Update", which was soon after dubbed "Penguin." Penguin adjusted a number of spam factors, including keyword stuffing.
4/19/12Panda 3.5Google quietly rolled out a Panda data update that appeared to be a fairly routine update with minimal impact.
4/16/12Parked Domain BugGoogle confirmed that a data error had caused some domains to be mistakenly treated as parked domains (and thereby devalued).