重大算法更新时间线

The BERT update has been rolling out for a week. It helps the search engine understand 1 out of 10 queries better than ever before. Google states that BERT represents “biggest leap forward in the past five years, and one of the biggest leaps forward in the history of search”. After the update, New York Times experienced a drop in their search traffic and rankings. Understanding searches better than ever before New York Times Search Ranking Drop After Google BERT Update

Also known as Starmageddon, this update is aimd to improve the the quality of Google review rich results and make them more helpful and meaningful. Making Review Rich Results more helpful Google Starmageddon

Google begins penalizing those sections (subdomains and subfolders) of websites that are leased out to other domains to help their content rank better. Google Begins Penalizing Domain Leasing

Despite of Google saying there are no fixes for their algorithm updates, the search engine posted advice on what site owners can do to help their domain perform better in the SERPs at time of their core updates. Also, the article confirms that Google does not announce smaller core updates because they are generally not widely noticeable. What webmasters should know about Google’s core updates

Danny Sullivan from Google confirms that the June 2019 Core Update has finished rolling out. Google June 2019 Core Update Finished Rolling Out

这次更新Google居然提前发布了预告信息，6月2号在Twitter上就提醒SEO们，第二天要上线2019年6月核心算法更新（June 2019 Core Update）。6月3号再次确认以及开始上线，需要几天才能在全世界范围同步。

虽然和以前的核心算法更新一样，June 2019 Core Update并不针对某个行业或某类网站，站长除了提高网站内容质量也没什么针对性的措施，但RankRanger等排名跟踪公司的数据认为，受影响最大的是赌博、健康、财经类网站，还是集中与YMYL类的网站。

June 2019 Core Update

Google has started rolling out several changes for Chrome users for safe browsing. Now, when the users visit HTTP pages, they will face a “not secure” notification. With this update, it has become necessary for HTTP websites to switch to HTTPS. Google: A milestone for Chrome security

Video Carousels that were limited only to mobile users have now been launched by Google for desktop users as well. Google’s New Video Carousels

这次更新和3月份的Brackets更新类似，是核心算法全面更新，SEO们没什么可以做的。 Google Confirms “Broad Core Update”

Brackets这个名字是Glenn Gabe起的。

Google确认了这次更新，但没有给出更多信息。Google在Twitter说明，像这样的全面核心算法更新，每年会有几次。要解决某个特定问题的更新，通常被成为focused，而这种并不针对特定问题的，称为core update，也就是核心算法更新。

Danny Sullivan说明，SEO没有什么可以针对这次算法做调整的，只要认真做内容就好了。排名下降的话，是因为别的页面以前可能被低估，现在上升了。 Google Confirmed Weekend Algorithm Ranking Shift As “Core Update”

Google designed a new ranking algorithm that would affect the mobile SERPs. The search engine will downgrade websites that have a really slow mobile page load speed. Also, Google has confirmed that the PageSpeed update will roll-out in July 2018 officially. Google: Using page speed in mobile search ranking

Google confirmed that it increased the search snippet’s character length to make them more descriptive and useful for people. A snippet is a short description of a page provided below its title and URL in the search results. Google increases length of snippets in search results

Google for Jobs is an initiative announced by the search engine to help job seekers and employers. You can now find jobs through Google search with clear intent. For example, if you search for ‘catering jobs in Boston’, Google will give you a preview of catering job listings in Boston. Also, you can open each ad to get comprehensive information about it. Connect to job seekers with Google Search

受影响网站：广告过多的低质量内容站，这类网站之所以存在，就是为了放 Adsense之类的广告，并没有提供给用户更多价值。

为什么叫Fred更新呢？因为SEO们问Google员工Gary Illyes这次更新叫啥名字时，Gary Illyes随便给了个名字，貌似是他养的鱼的名字，为什么想起这条鱼的名字呢？因为Gary Illyes刚给这条鱼拍了张照片，就是右边这张。Gary Illyes说，以后除非另行说明，不然所有更新都叫Fred了。就这么任性，就这么草率。 Google Has Now Confirmed The Fred Algorithm Update Big Google Algorithm Update Links Related Fred Update Targets Ad Heavy, Low Value Content Sites

受影响网站：这个惩罚算法针对移动页面：挡住主题内容的弹窗，干扰用户访问的大幅插页式广告，用户需要关掉插页才能看到页面实际内容，有时候需要等5-10秒才能关掉。不过据统计，被惩罚的网站并不多。 Google warns it will crack down on “intrusive interstitials” in January Official: Google Intrusive Interstitials Mobile Penalty Now Rolling Out

A major update rollout was suspected on both November, 10 and November, 18. A number of tools and MozCast (106.) recorded and reported the same. Some people in the industry suggested that the second update may have been a reversal of the first update. A lot of people also reported about the wrong dates on Google’s search snippets. Despite these fluctuations, Google did not confirmed either of these events. Was There A Google Search Update On November 10th? November 10, 2016 Google Algorithm Update – Was It A Core Ranking Update, The Mobile-first Index Being Tested, or Both? (Updated)

Webmasters witnessed a sudden and drastic fluctuation in local rankings and local pack results. Organic SERPs were also known to have been majorly affected. But since Google did not confirm the update, details are yet to be crafted. Everything you need to know about Google’s ‘Possum’ algorithm update Breaking Down Google’s Possum Update and What Role it Plays in Local SEO

Most tracking tools including ours showed major ranking fluctuation and changes. It is difficult to suggest what exactly happened since Google did not confirm anything. Concrete details are yet to be seen. Google Dismisses Any Recent Major Algorithm Update

While most marketers suspected this to be another Penguin rollout, Google confirmed it was a core algorithm update. The update saw major ranking fluctuations for both desktop and mobile queries. There was a global impact on a multitude of queries. Unnamed Update/Google Core Algorithm update

After a long wait of 10 months, Google finally rolled out a Panda refresh. The update will take several months to roll out completely. Since there were no immediate ranking fluctuations, the exact impact remains unclear. Google said this Panda update impacted 2 to 3% of English language search queries. How Panda 4.2 affects websites Google releases Panda 4.2

受影响网站：在移动搜索中给予移动友好的网站排名提升。也被称为Mobilegeddon – 天劫算法。

所谓移动友好，其实没那么复杂，用户能正常在手机访问页面就行了，所以字体不要太小，字距行距不要太小，用户不需要左右拉屏幕，手指头点击链接时不会点错地方，速度够快等等。自己用手机看看自己网站就知道是否移动友好了。也可以参考一下本博客移动SEO的帖子。

移动友好算法是针对页面级别的，需要页面重新抓取、索引后才能判断是否移动友好。所以算法本身4月底上线，但受影响的页面可能不是马上见到效果。

Google曾经预报说移动友好算法比熊猫和企鹅更新的影响还要大，但由于Google很早就提醒SEO们移动友好的重要性，很多网站已经做了移动优化，所以这次更新没有预计的那么有震撼性。 Mobilegeddon - Mobile Friendly Update from Google How Mobilegeddon affected websites?

This update was launced after two years of its original DMCA/"Pirate" update. The update was fighting against software and digital media piracy. It impacted majorly to a small group of sites causing major drops in rankings. British Phonographic Industry was among the ones who welcomed the update. Many popular torrent sites were hit including TorrentFreak. Google Pirate Update - A Post Mortem Analysis

This was the 27th Google Panda Update. It affected 3-5% of search queries depending on the location. Google indicated that update would improve the rankings of high quality small and medium sized sites. It also improved the accuracy of the algorithm. The release timing of the update was unclear. Panda 4.1 Is Rolling Out Panda Update 4.1: Winners / Losers – Google U.S.

受影响网站：使用了https的页面排名会稍微提升一点。Google声明这只是个很小的排名因素，但事实上对网站采用https起到了很大推动作用。 Impact of HTTPS/SSL on Rankings

With this update Google would stop including authorship photos in SERP inspite of the fact that Google promoting the connection between authorship and Google+. With this update it seemed Google+ was becoming less significant. By June 28th all photos were dropped from SERP. Rise & Fall Of Google Authorship Google Drops Authorship From Search Results

One of the most imporatant updates to the Panda algorithm which was a data refresh and a change in algorithm. Approximately 7.5% English language queries were affected by this update. Webamsters though have data which show that Google released it before the official date given (20/5). Google's Panda 4.0 Rolling Out

The update simply talked about a refresh in an algorithm update from 2012. This update penalized sites which had too many ads on the top of their pages or had ads that were very distracting to the users. The sites which contravened the rules of Google and escaped original update were in trouble. Also dubbed as "Top Heavy". Google Page Layout Algorithm Update Google Refreshes Page Layout Algorithm

This update just involved refreshing data, not showing any prominent changes in the algorithm. Some sites took a hit post the update while many others reported that the effect was minimal to moderate. Penguin 2.1 Is Live Now Google Penguin 2.1: Who Got Hit?

Google introduced ‘in-depth articles, this was done to provide fresh and good quality content. Google was once again focusing on freshness, only comprehensive and fresh content would feature on SERPs. Appearing in the "In-depth articles" feature Google Introducing "In-Depth Articles" To Search Results

Google increased the number of Knowledge Graph (KG) entries within the SERPs. According to the data provided by MozCast there was an increase of 50%. Brand searches in particular were benefitting from this, Google was giving easier access to users, in regard to information about brands. 25% of all searches would now include Knowledge Graph entries. Everything You Need To Know about Google's Knowledge Graph

There were massive fluctuations in rankings approximately between June 12th and "the week after July 4th", as mentioned by Matt Cutts in a tweet. It might have been that Google was testing some changes. Once the rankings stabilized it seemed Google did not make those changes permanent and were eventually rolled back. Multi-Week Update Rolls Out

受影响网站：针对垃圾和黑帽手法盛行的一些行业的查询词重点打击，如payday loan（发薪日贷款，一种小额、短期、利息高的贷款，一般下个发薪日就还上）、色情等。这些行业常用的作弊手法也经常是非法的。

2014年5月16号，发薪日贷款算法2.0上线，2014年6月12号，算法3.0上线。 Google Begins Rollout Of Payday Loan Algorithm 3.0 Today Google Payday Loans Algorithm Update Launch is Imminent

This update was released just before the Penguin 2.0 Update. It controlled domain crowding and diversity from page 2 and beyond on the SERPs. Domain Crowding Update

Matt Cutts at SMX West talked about the next Panda update saying that it will be the last update before integrating it in the search algorithm. He also recommended to use Fetch as Googlebot. Google Rolled Out Panda Refresh Google's 25th Panda Update Is Rolling Out

This update didn’t cause much ruckus. Though Google confirmed Panda 22, which looked like to have been data-only. Google Panda Update Version 22 Google Panda Influenced 0.8% Of Queries

In early January 2012 Google started penalizing sites which had too much ad space on top on their pages. This enhanced that system further. The doubt was that is it algorithmic or data-based change. Google Updates Above the Fold Page Layout Algorithm Google Rolls Out Its Page Layout Algorithm

Google released two month worth changes in one update. There were a total of 65 changes which included page quality assessment, improvement to local search, 7-result SERPs and Knowledge Graph expansion. 65 Google Algorithm Changes on August/September

Mixing with the EMD update, Panda algorithm was updated and the data refreshed affecting 2.4% of search queries. Industry sources decided to refer Panda updates in order as the naming conventions for the Panda algorithm got lost. Google Panda 20th Update - Impacting 2.4% English Search Queries Google Panda Update 20 Released

With this update it made some minor changes to the Panda algorithm. This was dubbed as 3.9.1 as the 3.0 series ran out. Overview of Google Panda 3.9.1 Update Google Panda 3.9.1 Update revealed

受影响网站：DMCA，Digital Millennium Copyright Act，数字千年版权法案，根据这个法案，版权作品被侵权，版权所有人可以向服务商要求删除侵权内容，服务商可以是主机商，域名注册商，ISP，以及搜索引擎。DMCA算法就是对收到很多侵权投诉删除要求的网站，Google给予排名惩罚。

DMCA Takedown Penalty又被称为pirate update，海盗算法。

2014年10月21号，DMCA惩罚算法上线2.0版本，很多BT种子网站、视频网站被大幅惩罚。 Google's DMCA Penalty update released Overview of Google DMCA penalty Update

This update affected ~1% of the search queries. Though queries were not affected that much but there was an initial period of fluctuations in results for a few days post the update. Google Panda 3.9 update July 24, 2012 Google Panda Alert: Data Refresh Starts Tonight

This was also another of Panda’s data refresh updates which didn't created much affect on SERPs. Google Panda 3.8 update - June 25th , 2012 Google Panda 3.8 Rolled out: What To do Next?

This update made 39 changes to the Penguin Update. This update brought better detection of major new events, detecting hacked pages and music rich snippets on mobile. Essentially also better link-scheme detection and update to Google News. 39 Google Algorithm Changes on June 2012

The idea behind this update was to make information more directly available to the users. This was done by improving its semantic analysis and interpretation to automatically display information within SERP for certain searches. Introducing the Knowledge Graph Knowledge Graph by Google

This update did not have much impact. It was released only a week after the last update (3.5). Panda Update 3.6 Is confirmed Panda 3.6 on April 27th

This update had minimal effect but it introduced a host of changes. The impact could not be easily ascertained. It made some minor changes and refreshed Google Panda’s data. Panda Update 3.5 Is Live

Google made 50 changes to improve Google’s search quality. The changes gave better local results, sources in Google News, introduced the +1 button to more countries and domains, changes to anchor-text "scoring" etc. Google also tweeted confirming the implementation of last Panda update. 50 Google Algorithm Changes in March

This wasn’t an update but a video giving the public insight into Google’s Weekly Search Quality Review Meeting’. It featured Matt Cutts and Amit Singhal among others and viewers get an idea of Google's process and priorities. uncut video: search quality meeting

40 changes were made in Google’s Search Quality Highlights. These changes increased accuracy in detecting official sites, improved synonyms for foreign languages, and brought freshness in search results and a Panda update. 40 Google Algorithm Changes in February

Google made 17 changes to its algorithm for better speed, freshness, and spell-checking. The major announcement was about to tighten the integration of Panda into the main search index. 17 search quality highlights Google’s Search Updates in January

The update released was a Panda Data Update in which the algorithm wasn't changed. Google didn't mention anything about "Panda flux" which was about making frequent updates. Panda 3.2 Update Confirmed Changes in Panda 3.2 Update

谷歌对其搜索结果算法进行了30次修改。这些变化是为了提供更好的片段，检测图像搜索中的垃圾内容，并为歌词提供更好的结果。 30 search quality highlights

熊猫2.5发布后，谷歌发布了“Panda Flux”，此后更新开始频繁。 Panda 3.1 Update - 11/18 Minor Panda Algorithm

受影响网站：Google官方帖子明确表示：更新鲜的内容会被更多展示在搜索结果中，尤其是最近的事件或热门话题、定期举办或发生的事件（如奥运会之类）、经常会更新的信息（如最新产品）。影响了35%的查询。 fresher search results Freshness Impact on Google Searches

10月份，这个更新发布了熊猫更新的一些小改动。它影响了2%的搜索查询，并由马特·卡茨在Twitter上宣布。 Google Panda Refresh - Flux Update

埃里克·施密特（谷歌首席执行官）宣布，2010年谷歌发布了516项更新。有趣的是，他们在同一年测试了13000个更新。谷歌宣布，他们希望把用户和搜索体验放在首位。 516 Google Algorithm

Google 的Sitelinks扩展到12个。在Google生成Sitelink一直是SEO工作者的梦想，因为这标志着网站被Google的认可程度以及品牌化 程度。8月16日，Google在其官方博客宣称其Sitelinks算法以及进行改进，新的Sitelinks已经增加到12个，格式包含：页面标 题，URL以及简介。和正常的搜索结果类似，这样更加有助于用户寻找到该网站的热门内容。 Evolution of Google's Sitelinks Google Expands and Manages Sitelinks

站长们开始争论Google的熊猫算法是否又进行了升级。Search Engine Land最终从Google处得到证实：“此次升级是我们每年高达500词算法变动中的一次”。目前尚未明确此次升级中是否添加了新的排名因素，或者只是对原有的排名因素及数据的简单升级。 Get Ready for Panda 2.3 Panda 2.3 Out

熊猫2.2在SMX大会上得到Google官方确认。自熊猫推出以后，Google一直在针对该算法进行持续不断的改进升级。根据Cutt的说法，此次升级主要针对那些采集复制的内容，并且此次升级是人工开启。 New Panda Update - 2.2 Panda Version 2.2

最开始被站长们成为“熊猫3.0”，是Google在2.0基础上进行的又一次升级。此次升级的改动以及造成的影响都比较小，所以站长们讨论得也比较少。 Google Panda 2.1 Update Is here Another Panda update

在Plus推出之前，Google推出了其+1按钮，类似于Facebook的Like或者Twitter的Tweets等。该按钮不但可以为用户在其网站上使用，而且直接整合到搜索结果中（包括自然结果及Adwords广告），让用户可以更加个性化的推荐自己需要的内容，并且影响到其整个社交圈子（Circles）的排名。 Google launches +1 Button Google Launches "Like" Button for Web Sites

针对日益猖獗的Spam内容，Google针对原创内容以及分发和采集内容做出的算法升级，根据Matt Cutts的说法，此次升级影响了2%的搜索结果。此次升级是熊猫行动的先兆。 Attribution Update Confimed Algorithm change

Google在其搜索结果返回条目的右侧添加了一个放大镜的图标，允许用户在Google结果页面上直接对网站进行预览。此次功能的升级昭示Google对Landing Pages的质量，设计及易用性的重新关注，同时也引起了SEO工作者对这些因素的重视。 Instant Previews of Search Results Google Instant Preview is Live!

Google允许同一域名在搜索结果中多次展示。简单的说，在以往的搜索结果中，同一个网站在搜索结果中往往只会显示一到两条的内容，但是此次升级允许同一网站内容多次显示，只要这些内容OK。 Multiple Results from Same Domain - Google Brand Update Google's First page results Dominated by One Domain

在四月末及5月初，站长们主要到很多长尾关键词的流量大幅度的下降。Matt Cutts随后确认了“May Day”是Google针对长尾关键词的一次算法升级，很多低质量内容的网站都受到了打击，特别是一些电子商务网站。此次升级同样也是熊猫行动的一个预兆。 "Mayday" Impacts Long Tail Traffic Matt Cutts Videos About Mayday Update

Google，Yahoo及Bing共同宣称支持新的标签：Canonical。该标签允许站长们在不影响用户使用的情况下，想搜索引擎表达标准化URL的信息。 Use canonical URLs - rel=canonical Introducing Rel Canonical Tag

受影响网站：Jagger分3个阶段上线，所以有Jagger1, Jagger2, Jagger3的名字。Jagger更新主要打击低质量链接，如交换链接、链接农场、买卖链接等。

早期的Google算法更新基本上都是webmasterworld命名的，Jagger也是webmasterworld创始人Brett Tabke起的名字，下面提到的更新名称大多是他们命名的。但貌似Jagger是最后一个，后来的名字大多是Google自己公布的了。 Jagger Update Review Spam in Google’s index - Update Jagger

貌似是“虚惊一场”，站长们发现了排名的变化，但是Google则称近期没有进行算法升级。Matt Cutts对此发表了一篇Blog，称Google的排名每天都会有变化，但是工具条的PR值及其他一些参数是每三个月才变化一次。 Gilligan Update : A False Update From Google Google Update Gilligan – Or Not

Google允许用户在站长工具后台提交XML网站地图，主要是为了有助于搜索引擎的收录所以。Google的XML地图文件如今已成为网站的标配。 Google Sitemap : New Feed Program Creating Sitemaps For Search Engines

受影响网站：不明确，或者说范围广泛，包括低质量外链、关键词堆积、过度优化等。 Update Allegra - 2-2-2005 Discussion On a new Update Allegra

Fritz更新是Google转为每天持续小幅更新索引的开始，这种更新方法又被称为everflux。 Update Fritz这个名字是Matt Cutts在他2006年的博客帖子里提到的Google内部名称，不是webmasterworld命名系列里的。 New Google Dance - "Update Fritz"

早期Google Dance的一次。Dominic也是webmasterworld命名，名称来源于参加Boston Pubcon大会时大家常去的一家披萨饭馆。 Google Dominic Update Discussion

2003年波士顿举行的SES大会上，Google员工公布了这次更新，为了和其它Google Dance以示区别，取名Boston。 Webmasterworld的创始人Brett Tabke就想，给更新取名字是个挺好的主意，所以就效仿台风的命名方法给Google更新取名，按字母排序，男名女名间隔，也得到了Google的首肯。 所以早期的Google算法更新大多是webmasterworld命名的。 The Boston Update!