A visual history of google algorithm changes

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Over the years, Google had made thousands of changes
to the way it finds and prioritizes information on the
web.
While most of these changes have been small, there
have also been several major changes, which have
significantly impacted how marketers think about SEO.
This presentation give you information about when and
why Google rolled out its most notable algorithm
changes.
Note:– We had also included some important and non-important
changes that they had a big impact on search results.

February 2003 –Boston: “More emphasis on quality
backlinks.”
April 2003–Cassandra: “Cracking down on linking from co-
owned domain, hidden text & link.”
May 2003–Dominic: “Improvements to the counting &
reporting of backlink”
June/July 2003 –Esmerelda& Fritz: “Improvements to the
index infrastructure.”
November 2003 –Florida: ‘Crackdown on, key-word-stuffing
& other black hat SEO tactics.”

January 2004 –Austin: “Crackdown on “invisible” text, meta
tag-stuffing.”
February 2004 –Brandy: “Index expansion, roll out of Latent
Semantic Indexing (LSI).”

February 2005 –Allegra: “Crackdown on suspicious-looking
links”
May 2005–Bourbon: “Improvements to how duplicate content
& non-canonical URL are treated.”
June 2005 –Personalized Search: “Results take user’s search
history into account.”
October 2005 –Jagger: “Crackdown on reciprocal link, link
farms, paid links.”
October 2005–Google Local: “Map data is integrated with
Local Business Center (LBC) data.”
December 2005–Big Daddy: “Update to URL canonicalization,
redirects, & other technical issues.”

November 2006 –Supplemental update: “Changes to the
supplemental index & filtered Pages”
May 2007 –Universal Search: “Integration of traditional results
with News, Video, Images, Local, etc.”
June 2007 –Buffy: “Update to single word search results &
other small changes.”

April 2008 –Dewey: “Unspecified update to the search index.”
February 2009 –Vince: “Big Brand get a boost in search
results.”
December 2009 –Real time search: “Twitter feeds, Google
News, & now content are integrated into real-time feed.”

April 2010 –Google Places: “LBC rebranded “Places,” is
integrated more closely with local search results.”
May 2010 –May Day: “Crackdown on low-quality pages
ranking for long-tail keyword searches.”
June 2010 –Caffeine: “Launch of the new web indexing
system, resulting in 50% fresher index.”
February 2011–Panda: “Crackdown on thin content, content
farms, sites with high ad-to-content ratio.”
November 2011 –Freshness Update: “Greater emphasis put on
recent content in search results.”

January 2012–Search* Your World: “Google+ data & user
profile included in search results.”
February 2012–Venice: “More localized results appear for
broad queries.”
April 2012 –Penguin: “Crackdown on link schemes, keyword-
stuffing, other black hat tactics.”
May 2012 –Knowledge Graph: “Relevant facts & images
included alongside traditional results.”
September 2012 –Exact Match Domain: “Crackdown on low-
quality sites that have search terms in their domain names.”

August 2013 –In-depth Articles: “New type of results,
dedicated to more evergreen, long-term content.”
August 2013 –Hummingbird: “Google recognizes full-
question searches, emphasizes high-quality content.”

A visual history of google algorithm changes

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