HEAVYGATE
Apply to work with us
HEAVYGATE
Apply to work with us →
Free reference · SEO history

Timeline of Google Algorithm Updates

A neutral, chronological reference of the major updates to Google Search’s ranking algorithm, from the 2003 “Florida” update to the latest core updates — including, for each one, who tended to get hit hardest and who benefited.

2003
November 2003
Florida update
One of the first major algorithm shake-ups. It targeted manipulative on-page tactics such as keyword stuffing and caused dramatic ranking changes, marking the point at which Google began actively fighting spam.
Hit hardestSites leaning on keyword stuffing, hidden text and aggressive on-page over-optimisation — many small commercial and affiliate sites, badly timed just before the Christmas shopping season.
Who gainedCleaner, more relevant pages and larger established sites that had not relied on those tricks.
2005
January 2005
The nofollow link attribute
Google, Yahoo and Microsoft jointly introduced the rel="nofollow" attribute so sites could mark links they did not endorse and help curb comment spam.
Hit hardestSpammers who had built rankings through mass blog-comment, forum and guestbook links, which the attribute devalued.
Who gainedSites earning genuine editorial links, whose relative authority rose as link spam was discounted.
2005–2006
Personalised search and Big Daddy
Google began tailoring results to individual users, and the “Big Daddy” infrastructure update overhauled how it crawled and indexed the web.
2010
June 2010
Caffeine
A rebuilt indexing system that let Google crawl and index pages far faster, delivering noticeably fresher results.
Who gainedFrequently updated sites — news outlets and active blogs — whose fresh content could now surface far sooner.
2011
February 2011
Panda
Targeted thin, low-quality and duplicated content, sharply reducing the visibility of “content farms” and pages built mainly to host adverts.
Hit hardestContent farms and mass-produced article mills (eHow-style publishers), thin affiliate pages, scraper sites and pages with more advertising than substance.
Who gainedOriginal, in-depth publishers and recognised brands with genuinely useful content.
2012
April 2012
Penguin
Targeted manipulative link building and webspam, penalising sites that had bought links or over-optimised their anchor text.
Hit hardestSites with manipulative link profiles — paid links, link networks, private blog networks (PBNs) and over-optimised exact-match anchor text.
Who gainedSites with natural, editorially earned links, and established brands.
September 2012
Exact-match domain (EMD) update
Reduced the ranking advantage of low-quality sites that relied on keyword-rich exact-match domains.
Hit hardestThin, low-quality sites that ranked mainly on a keyword-in-the-domain match (e.g. buy-cheap-widgets.com).
Who gainedBrandable sites and higher-quality competitors for the same terms.
2013
August 2013
Hummingbird
A rebuilt core algorithm focused on the meaning and intent behind a query rather than matching individual keywords, laying the groundwork for conversational search.
Hit hardestPages optimised for a single exact keyword without addressing what searchers actually wanted.
Who gainedPages that answered the intent behind a query and covered a topic in depth.
2014
July 2014
Pigeon
Overhauled local search, tying local rankings more closely to traditional web-ranking signals.
Hit hardestLocal businesses with thin websites that had ranked on proximity alone; some local results lost visibility.
Who gainedBusinesses with stronger conventional SEO signals, and large directories such as Yelp and TripAdvisor in many local queries.
August 2014
HTTPS as a ranking signal
Google confirmed that serving a site securely over HTTPS would be used as a lightweight ranking signal.
Who gainedSites that migrated to secure HTTPS, given a small edge over insecure equivalents.
2015
April 2015
Mobile-friendly update (“Mobilegeddon”)
Gave mobile-friendly pages a ranking boost in mobile search, reflecting the shift to browsing on phones.
Hit hardestSites without a mobile-friendly or responsive design, in mobile results.
Who gainedMobile-optimised sites — often smaller competitors that had adapted faster than slower-moving incumbents.
October 2015
RankBrain
Google confirmed a machine-learning system that helps interpret unfamiliar queries, describing it as one of its most important ranking signals.
Who gainedContent that matched the meaning of rare, ambiguous and long-tail queries.
2016
September 2016
Possum and real-time Penguin
Updated the local results filter, and Penguin became part of the core algorithm, running in real time.
Hit hardestPenguin shifted to devaluing bad links rather than penalising whole sites; some businesses were filtered out of local packs by the updated proximity and affiliation filters.
Who gainedBusinesses just outside strict city boundaries, which became visible for nearby searches.
2018
August 2018
“Medic” broad core update
A broad core update widely felt by health, medical and other “your money or your life” (YMYL) sites, underlining the role of expertise and trust.
Hit hardestYMYL sites lacking demonstrable expertise and authority — affiliate health and supplement sites, alternative-medicine pages, and personal health, wellness and finance blogs without credentialed authors.
Who gainedAuthoritative, credentialed sources: established medical institutions, mainstream health publishers and recognised brands. In the years that followed, some operators exploited aged and expired domains to fake that authority — a loophole Google would target directly in 2024.
2018
Mobile-first indexing
Google began primarily using the mobile version of a site for indexing and ranking.
2019
October 2019
BERT
Applied a natural-language-processing model to better understand the context of words in a search, improving results for longer, conversational queries.
Who gainedNaturally written content that answered nuanced, conversational queries; awkward keyword phrasing mattered less.
2021
June–August 2021
Page Experience and Core Web Vitals
Introduced user-experience signals — loading speed, interactivity and visual stability — into ranking.
Hit hardestSlow pages with poor layout stability or interactivity — though Google stressed this was a tie-breaker, not a major factor.
Who gainedFast, stable, well-built pages, all else being equal.
2022
August 2022
Helpful Content update
Introduced a site-wide signal that rewards content created for people and downranks content made primarily to rank in search engines.
Hit hardestSites publishing large volumes of search-first, unhelpful content, including thin how-to and AI-spun pages. The harshest effects came with the September 2023 version (below).
Who gainedSites with first-hand, genuinely people-first content.
2022
Link spam update
Used the SpamBrain system to neutralise the value of spammy, manipulative links at scale.
Hit hardestSites buying or building links at scale — SpamBrain neutralised the links rather than passing on their value.
Who gainedSites competing on genuinely earned authority.
2023
September 2023
Helpful Content update (and core updates)
The most severe version of the helpful-content system, followed by broad core and reviews updates. “Experience” was added to E-A-T (making it E-E-A-T), FAQ rich results were restricted and HowTo rich results were retired.
Hit hardestIndependent publishers, niche blogs and affiliate sites were hit hardest — many lost 30–90% of search traffic, with no clear path back, and news publishers reported Discover and Top Stories traffic collapsing.
Who gainedLarge media brands (Time Out, Lonely Planet), big e-commerce platforms and user-generated communities. Reddit, Quora and forums surged — Reddit’s search visibility rose more than tenfold — helped by a 2024 Google–Reddit data deal.
2024
March 2024
March 2024 core update
Described by Google as its most significant core update, it folded the helpful-content system into the core algorithm and ran alongside spam updates targeting scaled content abuse, expired-domain abuse and site-reputation abuse.
Hit hardestSites with scaled, mass-produced (often AI-generated) content; expired-domain abuse (buying aged domains to trade on their history); and site-reputation abuse, or ‘parasite SEO’, where third parties publish on a trusted domain. Many surviving independent sites fell further.
Who gainedSites Google judged genuinely helpful — though traffic kept consolidating toward large, authoritative brands.
May 2024
AI Overviews
AI-generated answer summaries, evolved from the Search Generative Experience, began appearing in Google Search, starting in the United States.
Hit hardestInformational and how-to publishers, as AI summaries answered queries on the results page and cut click-throughs (‘zero-click’ searches).
Who gainedGoogle’s own results surface, and the authoritative sources cited within the overviews.
Aug–Dec 2024
Further core and spam updates
Additional broad core updates in August, November and December, plus a December spam update, continued to reshape rankings.
Who gainedGoogle said the August 2024 update aimed to surface more independent and creator content after HCU criticism; recoveries were real but uneven.
2025
March 2025
March 2025 core update
The year’s first broad core update, rolling out 13–27 March, aimed at surfacing more relevant, satisfying content from all types of sites.
Who gainedGoogle again said it wanted to better surface content from creators; volatility was high and winners varied by niche.
June 2025
June 2025 core update
A broad core update running from late June into July, alongside the expansion of Google’s AI search features.
Who gainedRewarded experience and E-E-A-T, and was tied to ongoing AI Overview and retrieval changes.
August 2025
August 2025 spam update
A spam update targeting content that breaches Google’s spam policies, rolling out from late August.
Hit hardestSites breaching Google’s spam policies, including low-value and manipulative content.
December 2025
December 2025 core update
The year’s final broad core update, rolling out across December. Google disclosed little detail, as is now typical for core updates.

Compiled from Google’s public announcements and its official Search Status Dashboard. Dates reflect when each update began rolling out. Last updated June 2026.

Now accepting applications

Ready to move the only number that matters?

Tell us about your business and we'll tell you, straight, whether we can grow your revenue.

Apply to work with us →