Google Algorithm Change History 2012 : SEO Tips

2012 Updates

30 - (Search quality Highlights - 2012

Google announced 30 changes over the previous month, including image search landing-page quality detection, more relevant site-links, more rich snippets, and related-query improvements. The line between an "algo update" and a "feature" got a bit more blurred. For more refer the original source below.
30 search quality highlights - with codenames! (Google)
Google Announces “Megasitelinks,” Image Search Improvements & Better Byline Dates (SEL)

Panda 3.2 - January 2012

Google confirmed Panda 3.2 data update, although suggested that the algorithm hadn't changed. Only data refresh has been done a week ago.

Confirmed: Google Panda 3.2 Update (SEW)

Google Panda 3.2 Update Confirmed (SEL)

Page layout algorithm - Ads Above The Fold - January 2012

Google updated their page layout algorithms to devalue sites with too much ad-space above the "fold". It was previously suspected that a similar factor was in play in Panda. The update had no official name, although it was referenced as "Top Heavy" by some SEOs.

Page layout algorithm improvement (Google)

Pages With Too Many Ads “Above The Fold” Now Penalized By Google’s “Page Layout” Algorithm (SEL)

Panda 3.3 - February 2012

Google rolled out another post-"flux" Panda update, which appeared to be relatively minor. This came just 3 days after the 1-year anniversary of Panda, an unprecedented lifespan for a named update.

Google Confirms Panda 3.3 Update (SEL)

Confirmed: Google Panda 3.3 (SER)

Search Quality Video - March 12, 2012

This wasn't an algorithm update, but Google published a rare peek into a search quality meeting. For anyone interested in the algorithm, the video provides a lot of context to both Google's process and their priorities. It's also a chance to see Amit Singhal in action.

Video! The search quality meeting, uncut (Google)

Panda 3.4 - March 23, 2012

Google announced another Panda update, this time via Twitter as the update was rolling out. Their public statements estimated that Panda 3.4 impacted about 1.6% of search results.

Google Says Panda 3.4 Is ‘Rolling Out Now’ (SEL)

Parked Domain Bug — April , 2012

After a number of webmasters reported ranking shuffles, Google confirmed that a data error had caused some domains to be mistakenly treated as parked domains (and thereby devalued). This was not an intentional algorithm change.

Dropped In Rankings? Google’s Mistake Over Parked Domains Might Be To Blame (SEL)

Updated: Google Update April 2012? Over SEO Penalty? (SER)

Panda 3.5 - April , 2012

In the middle of a busy week for the algorthim, Google quietly rolled out a Panda data update. A mix of changes made the impact difficult to measure, but this appears to have been a fairly routine update with minimal impact.

Google Mocks Me For Missing Panda 3.5 (SER)

Penguin Update - April , 2012

After weeks of speculation about an "Over-optimization penalty", Google finally rolled out the "Webspam Update", which was soon after dubbed "Penguin." Penguin adjusted a number of spam factors, including keyword stuffing, and impacted an estimated 3.1% of English queries.

Another step to reward high-quality sites (Google)

The Penguin Update: Google’s Webspam Algorithm Gets Official Name (SEL)

Google Penguin Update Recovery Tips & Advice (SEL)

Two Weeks In, Google Talks Penguin Update, Ways To Recover & Negative SEO (SEL)

Panda 3.6 - April , 2012

Barely a week after Panda 3.5, Google rolled out yet another Panda data update. The implications of this update were unclear, and it seemed that the impact was relatively small.

Confirmed: Panda Update 3.6 Happened On April 27th (SEL)

Google : list of Quality Update till April -  May, 2012

Google published details of 52 updates in April, including changes that were tied to the "Penguin" update. Other highlights included a 15% larger "base" index, improved pagination handling, and a number of updates to sitelinks.

Search quality highlights: 52 changes for April (Google)

Google’s April Updates: Bigger & Tiered Index, Document Ranking, Sitelink Changes & More (SEL)

Knowledge Graph - May 16, 2012

In a major step toward semantic search, Google started rolling out "Knowledge Graph", a SERP-integrated display providing supplemental object about certain people, places, and things. Expect to see "knowledge panels" appear on more and more SERPs over time. Also, Danny Sullivan's favorite Trek is ST:Voyager?!

Introducing the Knowledge Graph: things, not strings (Google)

Google Launches Knowledge Graph To Provide Answers, Not Just Links (SEL)

Penguin 1.1 (#2) - May , 2012

Google rolled out its first targeted data update after the "Penguin" algorithm update. This confirmed that Penguin data was being processed outside of the main search index, much like Panda data.

Google Releases Penguin Update 1.1 (SEL)

Panda 3.7 (#15) — June , 2012

Google rolled out yet another Panda data update, claiming that less than 1% of queries were affect. Ranking fluctuation data suggested that the impact was substantially higher than previous Panda updates (3.5, 3.6).

Confirmed: Google Panda 3.7 Update (SER)

The Bigfoot Update (AKA Dr. Pete Goes Crazy) (SEOmoz)

Panda 3.8 (#16) — June , 2012

Google rolled out another Panda data refresh, but this appeared to be data only (no algorithm changes) and had a much smaller impact than Panda 3.7.

Official Google Panda Update Version 3.8 On June 25th (SEL)

Google Panda 3.8 Live: June 25th & Refresh Only (SER)

Link Warnings — July , 2012

In a repeat of March/April, Google sent out a large number of unnatural link warnings via Google Webmaster Tools. In a complete turn-around, they then announced that these new warnings may not actually represent a serious problem.

Insanity: Google Sends New Link Warnings, Then Says You Can Ignore Them (SEL)

Google Sends Out New Batch Of Unnatural Link Notifications (SER)

Panda 3.9 (#17) — July, 2012

A month after Panda 3.8, Google 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.

Official: Google Panda 3.9 Refresh (SER)

DMCA Penalty ("Pirate") — August, 2012

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?).
An update to our search algorithms (Google)
The Emanuel Update: Google Will Penalize Sites Repeatedly Accused Of Copyright Infringement (SEL)

Panda 3.9.1 (#18) — August , 2012

Google rolled out yet another Panda data update, but the impact seemed to be fairly small. Since the Panda 3.0 series ran out of numbers at 3.9, the new update was dubbed 3.9.1.
Confirmed: Google Panda 3.9.1 Update (SER)
Google Panda Refresh On August 19th: Version 3.9.1 (SEL)

Panda 3.9.2 (#19) — September , 2012

Google rolled out another Panda refresh, which appears to have been data-only. Ranking flux was moderate but not on par with a large-scale algorithm update.
Google Rolls Out Panda 3.9.2 Refresh (SER)
Panda Update 3.92 Rolling Out (Or Is It Panda 20 Time?) (SEL)

Exact-Match Domain (EMD) Update — September, 2012

Google announced a change in the way it was handling exact-match domains (EMDs). This led to large-scale devaluation, reducing the presence of EMDs in the MozCast data set by over 10%. Official word is that this change impacted 0.6% of queries (by volume).
Google's EMD Algo Update - Early Data (SEOmoz)
The EMD Update: Google Issues “Weather Report” Of Crack Down On Low Quality Exact Match Domains (SEL)

Penguin #3 — October 5, 2012

After suggesting the next Penguin update would be major, Google released a minor Penguin data update, impacting "0.3% of queries". Penguin update numbering was rebooted, similar to Panda - this was the 3rd Penguin release.
Google Penguin Update 3 Released, Impacts 0.3% Of English-Language Queries (SEL)
Google Released 3rd Penguin Update: Not Jarring Or Jolting (SER)

Page Layout #2 — October 9, 2012

Google announced an update to its original page layout algorithm change back in January, which targeted pages with too many ads above the fold. It's unclear whether this was an algorithm change or a Panda-style data refresh.
It’s “Top Heavy 2? As Google Rolls Out Update To Its Page Layout Algorithm (SEL)
Google Page Layout Algorithm Officially Updated (SER)

Panda #21 — November 5, 2012

Google rolled out their 21st Panda update, roughly 5-1/2 weeks after Panda #20. This update was reported to be smaller, officially impacting 1.1% of English queries.
Google Releases Panda Update 21, Impacts 1.1% Of US Queries In English (SEL)
Official: Google Panda Refresh On November 5th (Version 21) (SER)

Panda #22 — November 21, 2012

After some mixed signals, Google confirmed the 22nd Panda update, which appears to have been data-only. This came on the heels of a larger, but unnamed update around November 19th.
Official Google Panda #22 Update: November 21 (SER)
Confirmed: Google Panda Refresh #22 On November 21st; 0.8% Of Queries Impacted (SEL)

Knowledge Graph Expansion — December 4, 2012

Google added Knowledge Graph functionality to non-English queries, including Spanish, French, German, Portuguese, Japanese, Russian, and Italian. This update was "more than just translation" and added enhanced KG capabilities.
Get smarter answers from the Knowledge Graph from Português to Japanese to Russian (Google)
Google’s Knowledge Graph Expands To More Languages, Including Italian, French, Japanese And Russian (TechCrunch)

Panda #23 — December 21, 2012

Right before the Christmas holiday, Google rolled out another Panda update. They officially called it a "refresh", impacting 1.3% of English queries. This was a slightly higher impact than Pandas #21 and #22.
Confirmed: A Panda Refresh, Version #23 (SER)

Check out : Google Algorithm Change History 2013

Google 2014 Update

Here is the list of all the update and change history of 2014 By Google

Pirate 2.0 — October 21, 2014 

 

Penguin 3.0 — October 17, 2014

 

"In The News" Box — October 2014

 

Panda 4.1 (#27) — September 23, 2014

 

Authorship Removed — August 28, 2014

 

HTTPS/SSL Update — August 6, 2014

 

Pigeon — July 24, 2014

 

Authorship Photo Drop — June 28, 2014

 

Payday Loan 3.0 — June 12, 2014

 

Panda 4.0 (#26) — May 19, 2014

 

Payday Loan 2.0 — May 16, 2014

 

Unnamed Update — March 24, 2014

 

Page Layout #3 — February 6, 2014

 

 

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Google Algorithm Updates - 2013

Authorship Shake-up - December , 2013
As predicted by Matt Cutts at Pubcon Las Vegas, authorship mark-up disappeared from roughly 15% of queries over a period of about a month. The fall bottomed out around December 19th, but the numbers remain volatile and have not recovered to earlier highs.
Google's December Authorship Shake-up (Moz)

Penguin 2.1 (#5) - October, 2013
After a 4-1/2 month gap, Google launched another Penguin update. Given the 2.1 designation, this was probably a data update (primarily) and not a major change to the Penguin algorithm. The overall impact seemed to be moderate, although some webmasters reported being hit hard.
Penguin 5, With The Penguin 2.1 Spam-Filtering Algorithm, Is Now Live (SEL)
Google Penguin 2.1 Was A Big Hit (SER)

Hummingbird - August , 2013
Announced on September 26th, Google suggested that the "Hummingbird" update rolled out about a month earlier. Our best guess ties it to a MozCast spike on August 20th and many reports of flux from August 20-22. Hummingbird has been compared to Caffeine, and seems to be a core algorithm update that may power changes to semantic search and the Knowledge Graph for months to come.
FAQ: All About The New Google "Hummingbird" Algorithm (SEL)
Some Reports Of An August 21/22 Google Update (SER)

In-depth Articles - August , 2013
Google added a new type of news result called "in-depth articles", dedicated to more evergreen, long-form content. At launch, it included links to three articles, and appeared across about 3% of the searches that MozCast tracks.
In-depth articles in search results (Google)
Inside In-depth Articles: Dissecting Google's Latest Feature (Moz)

Knowledge Graph Expansion - July , 2013
Seemingly overnight, queries with Knowledge Graph (KG) entries expanded by more than half (+50.4%) across the MozCast data set, with more than a quarter of all searches showing some kind of KG entry.
The Day the Knowledge Graph Exploded (Moz)

Panda Recovery - July , 2013
Google confirmed a Panda update, but it was unclear whether this was one of the 10-day rolling updates or something new. The implication was that this was algorithmic and may have "softened" some previous Panda penalties.
Confirmed: Google Panda Update: The "Softer" Panda Algorithm (SER)

Multi-Week Update - June , 2013
Google's Matt Cutts tweeted a reply suggesting a "multi-week" algorithm update between roughly June 12th and "the week after July 4th". The nature of the update was unclear, but there was massive rankings volatility during that time period, peaking on June 27th (according to MozCast data). It appears that Google may have been testing some changes that were later rolled back.
Google's "Multi-Week" Algorithm Update (Moz)
Google's Matt Cutts: Multi-Week Update Rolling Out (SER)

"Payday Loan" Update - June, 2013
Google announced a targeted algorithm update to take on niches with notoriously spammy results, specifically mentioning payday loans and porn. The update was announced on June 11th, but Matt Cutts suggested it would roll out over a 1-2 month period.
Google Payday Loan Algorithm: Google Search Algorithm Update To Target Spammy Queries (SEL)
Google Spam Algorithm For Spammy Queries: Pay Day Loans+ (SER)

Panda Dance - June , 2013
While not an actual Panda update, Matt Cutts made an important clarification at SMX Advanced, suggesting that Panda was still updating monthly, but each update rolled out over about 10 days. This was not the "everflux" many people had expected after Panda #25.
Google’s Panda Dance: Matt Cutts Confirms Panda Rolls Out Monthly Over 10 Of 30 Days (SEL)

Penguin 2.0 (#4) - May , 2013
After months of speculation bordering on hype, the 4th Penguin update (dubbed "2.0" by Google) arrived with only moderate impact. The exact nature of the changes were unclear, but some evidence suggested that Penguin 2.0 was more finely targeted to the page level.
Penguin 2.0/4 - Were You Jarred and/or Jolted? (SEOmoz)

Domain Crowding  - May, 2013
Google released an update to control domain crowding/diversity deep in the SERPs (pages 2+). The timing was unclear, but it seemed to roll out just prior to Penguin 2.0 in the US and possibly the same day internationally.
Google Domain Crowding Update: May 2013 (High Position)
Google Domain Clustering Update (Justin Briggs)

"Phantom" - May , 2013
In the period around May 9th, there were many reports of an algorithm update (also verified by high MozCast activity). The exact nature of this update was unknown, but many sites reported significant traffic loss.
A Google Update Is Happening (Google: Nothing To Announce Now) (SER)
SEO Findings From Google’s Phantom Update (GSQi)

Panda #25 - March , 2013
Matt Cutts pre-announced a Panda update at SMX West, and suggested it would be the last update before Panda was integrated into the core algorithm. The exact date was unconfirmed, but MozCast data suggests 3/13-3/14.
Google Panda Update 25 Seems To Have Hit (SEL)

Panda #24  - January , 2013
Google announced its first official update of 2013, claiming 1.2% of queries affected. This did not seem related to talk of an update around 1/17-18 (which Google did not confirm).
Google Announces 24th Panda Refresh; Not Related To January 17th (SER)
Google Panda Update Version #24; 1.2% Of Search Queries Impacted (SEL)

Click here For Google Algorithm Change History 2014

Google Webmaster Guidelines

Best practices to help Google find, crawl, and index your site

Following these guidelines will help Google find, index, and rank your site. Even if you choose not to implement any of these suggestions, we strongly encourage you to pay very close attention to the "Quality Guidelines," which outline some of the illicit practices that may lead to a site being removed entirely from the Google index or otherwise impacted by an algorithmic or manual spam action. If a site has been affected by a spam action, it may no longer show up in results on Google.com or on any of Google's partner sites. 

•    Design and content guidelines

•    Technical guidelines

•    Quality guidelines
 

When your site is ready: 

•    Submit it to Google at http://www.google.com/submityourcontent/.

•    Submit a Sitemap using Google Webmaster Tools. Google uses your Sitemap to learn about the structure of your site and to increase our coverage of your WebPages.

•    Submit a Sitemap using Google Webmaster Tools. Google uses your Sitemap to learn about the structure of your site and to increase our coverage of your WebPages.

•    Make sure all the sites that should know about your pages are aware your site is online.

Design and content guidelines

•    Make a site with a clear hierarchy and text links. Every page should be reachable from at least one static text link.

•    Offer a site map to your users with links that point to the important parts of your site. If the site map has an extremely large number of links, you may want to break the site map into multiple pages.

•    Keep the links on a given page to a reasonable number.

•    Create a useful, information-rich site, and write pages that clearly and accurately describe your content.

•    Try to use text instead of images to display important names, content, or links. The Google crawler doesn't recognize text contained in images. If you must use images for textual content, consider using the "ALT" attribute to include a few words of descriptive text.

•    Make sure that your <title> elements and ALT attributes are descriptive and accurate.

•    Check for broken links and correct HTML.

•    If you decide to use dynamic pages (i.e., the URL contains a "?" character), be aware that not every search engine spider crawls dynamic pages as well as static pages. It helps to keep the parameters short and the number of them few.

•    Review our recommended best practices for images, video and rich snippets.

Technical guidelines

•    Use a text browser such as Lynx to examine your site, because most search engine spiders see your site much as Lynx would. If fancy features such as JavaScript, cookies, session IDs, frames, DHTML, or Flash keep you from seeing your entire site in a text browser, then search engine spiders may have trouble crawling your site.

•    Allow search bots to crawl your sites without session IDs or arguments that track their path through the site. These techniques are useful for tracking individual user behavior, but the access pattern of bots is entirely different. Using these techniques may result in incomplete indexing of your site, as bots may not be able to eliminate URLs that look different but actually point to the same page.

•    Make sure your web server supports the If-Modified-Since HTTP header. This feature allows your web server to tell Google whether your content has changed since we last crawled your site. Supporting this feature saves you bandwidth and overhead.

•    Make use of the robots.txt file on your web server. This file tells crawlers which directories can or cannot be crawled. Make sure it's current for your site so that you don't accidentally block the Googlebot crawler. Visithttp://code.google.com/web/controlcrawlindex/docs/faq.html to learn how to instruct robots when they visit your site. You can test your robots.txt file to make sure you're using it correctly with the robots.txt analysis tool available in Google Webmaster Tools.

•    Make reasonable efforts to ensure that advertisements do not affect search engine rankings. For example, Google's AdSense ads and DoubleClick links are blocked from being crawled by a robots.txt file.

•    If your company buys a content management system, make sure that the system creates pages and links that search engines can crawl.

•    Use robots.txt to prevent crawling of search results pages or other auto-generated pages that don't add much value for users coming from search engines.

•    Test your site to make sure that it appears correctly in different browsers.

•    Monitor your site's performance and optimize load times. Google's goal is to provide users with the most relevant results and a great user experience. Fast sites increase user satisfaction and improve the overall quality of the web (especially for those users with slow Internet connections), and we hope that as webmasters improve their sites, the overall speed of the web will improve.

Google strongly recommends that all webmasters regularly monitor site performance using Page Speed, YSlow,WebPagetest, or other tools. For more information, tools, and resources, see Let's Make The Web Faster. In addition, the Site Performance tool in Webmaster Tools shows the speed of your website as experienced by users around the world.