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The Complete Google SEO Algorithm Update History – 1998 to Today

Author: Bill Ross | Reading Time: 6 minutes | Published: October 30, 2025 | Updated: March 6, 2026

Google Seo Algorithm 3 Emulent

Google Updates

This page lists Google’s algorithm updates from 1998 to 2026. It includes major and minor changes, both confirmed and unconfirmed, as well as micro updates. You’ll find information on core updates, spam, mobile changes, new features, ranking signals, volatility, and experiments.

Date Update Name Type Description
Foundation & Early Algorithmic Changes (1998-2003)
September 1998 Google Launch & PageRank Core/Ranking Launches with PageRank, evaluating web pages based on quantity and quality of backlinks. Sets the paradigm for search ranking for decades.
2000 Google Toolbar Feature Introduces public PageRank, giving site owners visibility into ranking importance and sparking early SEO awareness.
2001-2002 Google Dance Micro Volatility Monthly index refreshes cause oscillations and worry, laying groundwork for future continuous updates.
September 2002 First Documented Update Quality & Spam Starts to prioritize spam detection and contextual understanding over raw on-page signals.
Major Named Updates & Linking Era (2003-2010)
February 2003 Boston Core Regularization First regular/named update, marks intentional algorithm adjustments.
April 2003 Cassandra Spam Targets hidden text, excessive cross-domain links.
May 2003 Dominic Link Analysis Enhances backlink counting and link structure analysis.
July 2003 Fritz Indexing Switches from monthly reindexing to daily incremental refreshes.
November 2003 Florida Spam Penalty Historic update against keyword stuffing, doorway pages, meta manipulation. Fundamentally alters SEO best practices.
January 2004 Austin Spam Targets invisible text and meta abuse post-Florida.
February 2004 Brandy Semantic Introduces LSI (Latent Semantic Indexing) and link “neighborhoods” – early semantic search signals.
September 2005 Jagger Links Tackles paid/unethical links, hidden content, and canonicalization issues.
December 2005 Big Daddy Technical Improves redirects, canonicalization and site architecture.
May 2007 Universal Search Feature Blends images, videos, local & news results into main search, reshaping SERPs forever.
February 2009 Vince (Brand) Trust Signals Favours big, trusted brands for competitive keywords.
July 2009 Caffeine Preview Infrastructure Major indexing overhaul for faster, larger web crawling.
Panda, Penguin, Hummingbird Era (2011-2014)
June 2010 Caffeine Launch Indexing Expedites crawling and indexing, allowing fresher results.
February 2011 Panda 1.0 Quality/Content Targets thin, duplicate, low-quality, and farmed content; major visibility shifts for publishers.
March 2011 – 2012 Panda Updates 2.0+ Quality/Content Wave of Panda iterations, eventually merged into core algorithm.
November 2011 Freshness Update Content Recency Prioritizes current content for timely queries (news, sports, etc).
January 2012 Page Layout (Top Heavy) User Experience Penalizes sites overloaded with ads above-the-fold.
February 2012 Venice Local Search Shows local results based on IP/location for general queries.
April 2012 Penguin 1.0 Link Spam Targets manipulative links and anchor text stuffing.
May-August 2012 Panda/Penguin Micro Updates Volatility/Spam Frequent micro-adjustments and penalty updates.
August 2012 Pirate Copyright Downranks sites flagged for repeated DMCA/copyright violation.
September 2012 EMD (Exact Match Domain) Domain Quality Reduces rankings for spammy exact-match domains.
August 2013 Hummingbird Semantic/NLP Complete rewrite for semantic understanding of natural language, query intent, and concepts.
2013-2014 Payday Loan Updates Spam/Niche Targets spammy queries, especially in finance and high-risk markets.
July 2014 Pigeon Local Search Refines local pack using core signals; major impact on local SEO strategies.
Mobile, RankBrain, The Era of AI (2015-2018)
April 2015 Mobile-Friendly (“Mobilegeddon”) Mobile Ranking Mobile-friendly design becomes a ranking factor; mobile UX prioritized.
May 2015 Quality Update (“Phantom 2”) Quality Core signals improved to gauge site quality and genuine engagement.
October 2015 RankBrain AI/Machine Learning From ambiguous queries to general signals, AI now interprets search intent and refines rankings.
January 2016 Panda Core Integration Quality (Realtime) Panda principles now part of continuous ranking, not discrete updates.
May 2016 Mobile-Friendly 2 Mobile Ranking Further strengthens mobile UX ranking factors.
September 2016 Penguin 4.0 Real-Time Spam (Realtime) Spammy links now algorithmically devalued at page level, not penalized sitewide.
September 2016 Possum Local Search Increases diversity and location-based filtering for local results.
March 2017 Fred Ad/Content Penalty Targets low-value, ad-heavy, thin content monetized for revenue, not users.
Core Updates, E-A-T, BERT, Volatility Expands (2018-2021)
February 2018+ Broad Core Updates Quality/Ranking Regular broad updates now standard, affecting multiple industries and types of queries.
March 2018 Mobile-First Indexing Indexing/Mobile Google begins indexing/ranking sites based on mobile content and signals first.
July 2018 Mobile Speed Update Speed/Mobile Mobile page speed becomes a ranking factor (applies to slowest pages).
August 2018 Medic Update Core/EAT YMYL sites (health/finance) get hit hardest; expertise, authority, trust emphasized.
2019 BERT Integration NLP/AI Better natural language understanding, especially of context/prepositions.
2020 Featured Snippet Deduplication UI/SERP Logic Featured snippet URLs removed from top results beyond snippet placement.
May/Dec 2020 Broad Core Updates Quality Amid pandemic, Google rewards authoritative, trusted, up-to-date content.
Product Reviews, Helpful Content, SpamBrain, & AI (2021-2026)
March 2021 Product Reviews Update Content Quality Aims to reward in-depth, unbiased, authentic product review content.
June 2021 Page Experience Update UX/Technical Core Web Vitals (speed, stability, interactivity) join ranking factors – mobile focus.
June-July 2021 Spam Updates Spam/Quality New spam detection systems, anti-cloaking, auto-generated/hacked content suppression.
July 26, 2021 Link Spam Update Spam/Quality Algorithm update to identify and nullify link spam; impacts sponsored, guest, and affiliate content. Rolled out over two weeks across multiple languages.
November 3, 2021 November 2021 Spam Update Spam/Quality Spam update rolled out Nov 3–11 as part of regular work to improve results quality.
November 17, 2021 November 2021 Core Update Core/Quality Broad core algorithm update affecting multiple verticals; completed late November.
November 30, 2021 November 2021 Local Search Update Local Search Local search ranking update rolled out Nov 30 – Dec 8, affecting local pack results and proximity signals.
December 1, 2021 December 2021 Product Review Update Content Quality Product review update for English-language pages, estimated three-week rollout.
February 22, 2022 Page Experience Update (Desktop) UX/Technical Page experience signals including Core Web Vitals extended to desktop search; completed March 2022.
March 23, 2022 March 2022 Product Reviews Update Content Quality Third product review algorithm update enabling better identification of high-quality, in-depth reviews.
May 22, 2022 May 2022 Core Update Core/Quality Broad core update rolled out May 22 – June 9, affecting rankings across industries.
July 27, 2022 July 2022 Product Reviews Update Content Quality Product review algorithm update completed August 2; continued emphasis on authentic, first-hand review content.
August 25, 2022 Helpful Content Update Quality Site-wide signal targets ranking-focused, low-value content; rewards “people-first” writing.
September 12, 2022 September 2022 Core Update Core/Quality Core algorithm update rolled out Sep 12–26; broad ranking shifts across verticals.
September 20, 2022 September 2022 Product Reviews Update Content Quality Product review update rolled out Sep 20–26; page-level targeting of review content quality.
October 19, 2022 October 2022 Spam Update Spam/Quality Spam update completed in just two days (Oct 19–21); AI-based spam filtering improvements.
December 5, 2022 December 2022 Helpful Content Update Quality Helpful content system refinement; rolled out Dec 5 – Jan 12, 2023. Updated guidance on content quality signals.
December 14, 2022 December 2022 Link Spam Update Spam/Quality Leverages SpamBrain to neutralize unnatural links; rolled out Dec 14 – Jan 12, 2023.
February 21, 2023 February 2023 Product Reviews Update Content Quality Product reviews update expanded to 11 languages globally (English, Spanish, German, French, Italian, Vietnamese, Indonesian, Russian, Dutch, Portuguese, Polish). Completed March 18.
March 15, 2023 March 2023 Core Update Core/Quality Core algorithm update rolled out Mar 15–28; broad ranking adjustments.
April 12, 2023 April 2023 Reviews Update Content Quality Reviews update with heavy focus on experience signals (E-E-A-T); rolled out Apr 12–25.
August 22, 2023 August 2023 Core Update Core/Quality Core algorithm update rolled out Aug 22 – Sep 7.
September 14, 2023 September 2023 Helpful Content Update Quality Helpful content system update with algorithm changes; rolled out Sep 14–28. Refined signals for people-first content.
October 4, 2023 October 2023 Spam Update Spam/Quality Spam update with improved SpamBrain coverage across many languages; rolled out Oct 4–19.
October 5, 2023 October 2023 Core Update Core/Quality Core update rolled out Oct 5–19; caused a Discover traffic bug that Google subsequently fixed.
November 2, 2023 November 2023 Core Update Core/Quality Core algorithm update rolled out Nov 2–28.
November 8, 2023 November 2023 Reviews Update Content Quality Algorithm update targeting review content on a page-level basis; rolled out Nov 8 – Dec 7.
March 5, 2024 March 2024 Core + Spam Update Quality/Spam Major double rollout targeting authenticity and spam at scale, especially AI-generated content. Aimed to reduce “unhelpful” content by 40%. Deindexed hundreds of websites. Core completed Apr 19 (45 days); spam portion finished earlier.
May 6, 2024 Site Reputation Abuse (Manual Actions) Policy/Spam Google begins enforcing site reputation abuse (“parasite SEO”) policy with manual actions against third-party content on established domains. Algorithmic enforcement planned for future.
May 14, 2024 AI Overviews Feature/UI AI-generated summaries (formerly SGE) released for U.S. queries using Gemini model; later expanded globally. Initial turbulence and visibility shifts for publishers.
June 20, 2024 June 2024 Spam Update Spam/Quality Spam update focused on cloaking, doorway domains, expired domain abuse, scaled content manipulation, keyword stuffing, misleading functions, and hidden text. Completed in approximately one week.
July 31, 2024 Explicit Fake Content Update Content/Safety Algorithm update targeting non-consensual explicit content, specifically AI-generated deepfake images and videos.
August 15, 2024 August 2024 Core Update Ranking/Content Core update supportive of small/independent publishers, with fixes for prior harsh helpful content signals. Google confirmed AI Overviews also affected by core updates. Completed September 3.
November 11, 2024 November 2024 Core Update Core/Quality Core update rolled out Nov 11 – Dec 5 (three weeks). Analysis showed publishers falling while Reddit rose in visibility.
November 19, 2024 Site Reputation Abuse (Expanded Enforcement) Policy/Spam Updated site reputation abuse policy with penalties hitting major publishers. Algorithmic detection and demotion planned for future rollout.
December 12, 2024 December 2024 Core Update Core/Quality Core update rolled out Dec 12–18; quick six-day rollout affecting global results.
December 19, 2024 December 2024 Spam Update Spam/Quality Final spam update of 2024; rolled out Dec 19–26. Sharper E-E-A-T guidelines and clearer distinctions for helpful vs. spam content.
March 13, 2025 March 2025 Core Update Ranking/Quality Core update prioritizing trust, original research, and genuine user benefit. Rolled out Mar 13–27 (two weeks).
June 30, 2025 June 2025 Core Update Ranking/Quality Global improvements to diversity and relevance in search results. Rolled out Jun 30 – Jul 17 (over two weeks). John Mueller noted core updates build on long-term data.
August 26, 2025 August 2025 Spam Update Spam/Quality Targeted further suppression of AI-generated, low-value and manipulative content. Rolled out Aug 26 – Sep 21 (26 days).
December 11, 2025 December 2025 Core Update Core/Quality Core update affecting search results globally. Rolled out Dec 11–29 (18 days). Analysis showed more brands winning “Best Of” queries.
February 5, 2026 Discover Core Update Core/Feature Core update focused specifically on the Discover feed (not general Search). Initially for English-language U.S. users, rolling out over two weeks before expanding to more countries and languages. Google also revised Discover guidelines alongside the update.
Micro-Updates, Unconfirmed Events, Volatility (Every Year)
Ongoing Indexing Bug Fixes Indexing/Micro De-indexing error corrections and instant volatility events.
Ongoing Featured Snippet Changes UI/SERP Algorithm tweaks for what appears in snippets, deduplication and diversity.
Ongoing Local Algorithm Tweaks Local/Volatility Encompasses regular filtering changes, business proximity, address variations, pack adjustments.
Ongoing Niche/Vertical Experiments Industry-Specific Temporary boosts/demotions affecting specific sectors (health, news, YMYL, product reviews).
Ongoing International/Language Updates Country-Specific Localized ranking signals and regulatory-driven tweaks for non-English regions.
Ongoing UI/Feature Rollouts SERP/UX Frequent experiments with search layout, AMP, carousels, mobile designs, instant answers.

Google Update List In More Detail