Your traffic dropped, and an SEO newsletter says Google just rolled out an update. Case closed? Not yet. A drop that lines up with a rollout date is not proof the update caused it.
This guide covers the full history of Google algorithm updates, from Florida in 2003 to the November 2026 core update now rolling out, with official rollout durations from the Google Search Status Dashboard. Then it answers the question that actually matters when your traffic moves: was it really an algorithm update, and what should you check next?
Calculated from Google Search Status Dashboard rollout durations, November 2021 to November 2026.
What are Google algorithm updates?
Google algorithm updates are changes to the ranking systems that decide which pages appear in search results and in what order.
Google makes thousands of small changes every year. Only a handful are announced, named and logged on the Search Status Dashboard, which records confirmed updates from November 2021 onward.
One rule runs through this page: updates are labeled confirmed (announced by Google) or industry-named (named by SEOs after observing ranking volatility). Florida, Jagger, Big Daddy, Vince, Fred, Medic and Pigeon are industry names, not official Google labels.
Core updates vs. spam updates vs. other search changes
Mixing up update types leads to the wrong diagnosis. Classify a change before you react to it.
| Type | What it changes | Check first |
|---|---|---|
| Core | Broad reassessment of relevance and quality across the web | Which pages and queries lost visibility, and who gained |
| Spam | Detection of policy violations, often powered by SpamBrain | Link schemes, scaled content abuse, expired domain abuse |
| Ranking system | A named system scoring one quality dimension, such as Panda, Penguin or the reviews system | The specific signal that system evaluates |
| Indexing | How Google crawls, stores or selects pages, such as Caffeine or mobile-first indexing | Mobile rendering, canonicals, indexing coverage |
| Policy | New rules, often with manual actions before algorithmic demotion | Manual actions report in Search Console |
| SERP feature | How results are displayed, such as AI Overviews | CTR falling while average position holds |
| Discover | Ranking in the Discover feed, not Search | Discover performance report |
Google notes that a drop after a core update does not mean a site violated spam policies. Core updates reassess quality relative to other pages, so a site can lose positions without doing anything wrong.
How long do Google algorithm updates take to roll out?
Google has confirmed two to four core updates a year since 2021, plus a similar number of spam updates. You cannot judge an update's impact until it finishes, so rollout length shapes every diagnosis.
| Update type | Typical rollout | Shortest | Longest |
|---|---|---|---|
| Core updates (16) | About 14 to 15 days | 6 days (Dec 2024) | 45 days (Mar 2024) |
| Spam updates, incl. link spam (11) | Highly variable | Under 1 day (Mar 2026) | Nearly 27 days (Aug 2025) |
| Helpful content updates (3) | 13 to 38 days | 13 days (Sep 2023) | 38 days (Dec 2022) |
| Reviews updates (7) | 6 to 29 days | 6 days (Jul and Sep 2022) | 29 days (Nov 2023) |
The March and May 2026 core updates each finished in about 12 days, and most 2026 spam updates finished in under three. All dashboard times are US/Pacific, so a rollout may begin on the next calendar day in Asian or European Search Console data.
Google algorithm update timeline, 2003 to 2026
Dates from November 2021 onward come from the Search Status Dashboard. Earlier dates come from Google announcements or, where marked, industry observation.
2025 to 2026: faster core updates, frequent spam updates, Discover
- November 2026 core update Core In progress
Started around 1:07 pm ET, with Google expecting up to two weeks. The third core update of 2026, global and in all languages. Don’t change pages mid-rollout: what to do during the November 2026 core update.
- September 2026 spam update Spam
Rolled out over 13 days, 16 hours, the longest spam update of 2026.
- August 2026 spam update Spam
2 days, 16 hours.
- June 2026 spam update Spam
2 days, 1 hour.
- May 2026 core update Core
11 days, 21 hours.
- March 2026 core update Core
12 days, 4 hours.
- March 2026 spam update Spam
19 hours, 30 minutes, the fastest rollout on record.
- February 2026 Discover update Discover
21 days, 17 hours. Affected the Discover feed only, not Search.
- December 2025 core update Core
18 days, 2 hours.
- August 2025 spam update Spam
26 days, 15 hours, an unusually long spam rollout.
- June 2025 core update Core
16 days, 18 hours.
- March 2025 core update Core
13 days, 21 hours.
2020 to 2024: helpful content, page experience and AI search
- December 2024 spam update Spam
7 days, 2 hours.
- December 2024 core update Core
6 days, 4 hours, the shortest core rollout since 2021.
- November 2024 core update Core
23 days, 13 hours.
- August 2024 core update Core
19 days, 4 hours. A separate ranking incident began the same day.
- June 2024 spam update Spam
7 days, 1 hour.
- AI Overviews launch in the US SERP feature
A search results feature, not a ranking update.
- Site reputation abuse enforcement Policy
Manual actions against third-party content hosted to exploit a site’s ranking signals.
- INP replaces FID Metric
Interaction to Next Paint became the Core Web Vitals responsiveness metric.
- March 2024 core update Core
45 days, the longest core rollout. Folded the helpful content system into core ranking.
- March 2024 spam update Spam
14 days, 21 hours. Launched with policies on scaled content, expired domain and site reputation abuse.
- November 2023 reviews update Ranking system
29 days.
- November 2023 core update Core
25 days, 21 hours.
- October 2023 core update Core
13 days, 23 hours. A 26-day ranking incident began the same day.
- October 2023 spam update Spam
15 days, 12 hours.
- September 2023 helpful content update Ranking system
13 days, 11 hours. The last standalone helpful content update.
- August 2023 core update Core
16 days, 3 hours.
- December 2022 link spam update Spam
29 days. Used SpamBrain to neutralize unnatural links.
- December 2022 helpful content update Ranking system
38 days.
- Helpful content update launch Ranking system
15 days. Introduced the helpful content system.
- May 2022 core update Core
15 days.
- Page experience update for desktop Ranking system
9 days.
- Page experience update (mobile) Ranking system
Core Web Vitals became part of page experience ranking signals.
The March 2024 core update is the turning point of this era. Google folded the helpful content system into its core ranking systems, so standalone helpful content updates ended. A parallel spam update launched new policies on scaled content abuse, expired domain abuse and site reputation abuse. Reviews updates now also run inside core updates.
2015 to 2019: machine learning and mobile
- BERT Ranking system
Better understanding of natural language queries.
- Medic (industry-named) Core
Large swings for health and finance sites.
- Mobile-first indexing rollout Indexing
Google began indexing the mobile version of pages. Announced 2016, largely complete by 2023.
- Fred (industry-named) Core
Hit ad-heavy, low-value content sites.
- RankBrain Ranking system
Machine learning used to interpret unfamiliar queries.
- Mobile-friendly update Ranking system
Mobile usability became a mobile ranking signal. Known in the industry as Mobilegeddon.
2011 to 2014: Panda, Penguin and semantic search
- Pigeon (industry-named) Ranking system
Local results tied more closely to web ranking signals.
- Hummingbird Ranking system
Core algorithm rebuilt around query meaning.
- Payday Loan Spam
Targeted heavily spammed queries.
- Exact Match Domain Ranking system
Reduced rankings for low-quality exact match domains.
- Penguin Spam
Targeted link schemes and manipulative anchor text. Real-time and part of core from September 2016.
- Venice Ranking system
Local intent shown for broad queries.
- Page layout Ranking system
Demoted pages with heavy ads above the fold.
- Freshness Ranking system
Favored recent content for time-sensitive queries.
- Panda Ranking system
Demoted thin, duplicate and low-quality content. Confirmed part of core in January 2016.
2003 to 2010: early anti-spam and infrastructure
- Caffeine Indexing
New indexing infrastructure for fresher results.
- Vince (industry-named) Ranking system
Big brands gained on broad commercial queries.
- Big Daddy (industry-named) Indexing
Infrastructure update affecting canonicalization and redirects.
- Jagger (industry-named) Spam
Targeted low-quality links and link farms.
- Florida (industry-named) Spam
Disrupted keyword-stuffed and manipulative rankings.
Your traffic dropped. Was it really a Google algorithm update?
Rule out the other causes before you rewrite content or disavow links. Each of these can produce a drop that coincides with a rollout by chance.
| Possible cause | How to recognize it | What to check |
|---|---|---|
| Core update | Gradual decline across many queries during a confirmed rollout | Full rollout period vs. an equal period before it |
| Spam update | Sharp drop concentrated on pages with manipulative links or scaled content | Manual actions report, backlinks, thin programmatic pages |
| Ranking incident | Volatility during a logged dashboard incident | The dashboard incident list for the same dates |
| Crawling problem | Fewer pages crawled, server errors, slow responses | Crawl stats report, server logs, robots.txt changes |
| Indexing problem | Indexed page count falls, pages excluded | Page indexing report, noindex tags, canonical tags |
| Site deployment | Drop starts the day a release shipped | Templates, redirects, internal links, rendering |
| Search demand | Impressions fall but position holds | Google Trends and seasonality for main queries |
| SERP changes | Position holds but CTR falls | AI Overviews and other features on your queries |
Overlapping incidents make this harder. A ranking incident began on October 5, 2023, the same day as the October 2023 core update, and lasted 26 days. Another began on August 15, 2024, alongside the August 2024 core update. A site that dropped in either window may have been hit by the update, the bug, or both.
A rollout date is a lead, not a verdict.
01Confirm
Check the Search Status Dashboard and wait until the rollout is marked complete. Mid-rollout data is unreliable.
02Compare
In Search Console, compare the period after completion with an equal period before the start, weekdays to weekdays. The free GSC Analyzer sorts pages and queries by lost clicks faster.
03Isolate
Find whether the loss is sitewide or limited to pages, directories or query types, and whether it is position, impressions or CTR. Each points to a different cause.
04Check your own changes
Review deployments, redirects and template changes in the same window. See SEO issues after a deployment.
Technical SEO checks to run after an algorithm update
The update history shows which signals each lineage targeted. Use it to decide what to audit first.
| Update lineage | Signal it targets | What to audit |
|---|---|---|
| Panda, helpful content, core updates | Content quality and originality | Thin pages, duplicates, near-identical landing pages |
| Penguin, link spam updates | Link schemes | Unnatural backlinks, sitewide links, manipulative anchor text |
| Spam updates since 2024 | Scaled content, expired domains, site reputation abuse | Programmatic pages, third-party content on your domain |
| Mobile-first indexing | The mobile version of the page | Content missing on mobile, rendering, structured data parity |
| Page experience | Core Web Vitals and usability | LCP, INP (FID retired March 2024), CLS, interstitials |
| Caffeine, Big Daddy | Crawling, indexing, canonicalization | Redirect chains, conflicting canonicals, soft 404s, orphan pages |
For content-quality drops, start with thin content. For indexing drops, look for leftover noindex issues, orphan pages, broken internal links and JavaScript SEO problems. Test robots rules with the free robots.txt checker.
Then run a fresh crawl and compare it with your last audit before the update. A regression that shipped the same month, such as a template change that dropped internal links or a robots rule that blocked a directory, is easier to fix than a quality reassessment and is often the real cause. A crawl comparison cannot tell you why Google re-ranked your pages. It tells you whether your site changed.
How to recover from a Google algorithm update
Recovery from a core update is possible but rarely fast. Google reassesses sites continuously, yet large gains usually show up at a later core update, often months away.
- Find the actual problem using the diagnosis steps above before changing anything.
- Prioritize affected pages that lost the most clicks.
- Make meaningful improvements: rewrite, consolidate or remove weak content, fix technical regressions, and clean up link issues for spam-related drops.
- Avoid quick fixes such as changing dates, padding word count or mass-deleting pages.
- Monitor over time and judge results after the next core update, not after a week.
For a manual action, fix the violation and submit a reconsideration request in Search Console. Algorithmic spam demotions have no request process; recovery follows the cleanup.
How to monitor Google algorithm updates
The Search Status Dashboard is the only authoritative source for confirmed rollout dates. It offers an RSS feed and a JSON history feed, so new updates can be tracked automatically.
- Search Status Dashboard: confirmed core, spam and Discover updates, plus ranking incidents.
- Search Console performance report: clicks, impressions, CTR and average position by page and query.
- SERP volatility tools: early signals of unconfirmed updates, which should stay labeled as unconfirmed.
- Scheduled technical audits: a baseline crawl before each update makes before-and-after comparison possible. See SEO monitoring.
Keep a change log of your own deployments. When an update lands, you will be able to tell your changes apart from Google's.
Frequently asked questions
Does every Google algorithm update affect rankings?
No. Most changes are small and go unnoticed. Even confirmed core updates affect sites unevenly, and many sites see no meaningful change.
How long does a Google core update take to roll out?
Since 2021, the median core update has taken about two weeks. The range runs from 6 days (December 2024) to 45 days (March 2024).
How often does Google update its algorithm?
Google makes thousands of small changes a year. It typically confirms two to four core updates and a similar number of spam updates annually.
Can a website recover after a core update?
Yes, but recovery usually follows real improvements and tends to appear at a later core update rather than within days.
Can technical SEO problems cause a drop that looks like an update?
Often. Indexing errors, broken redirects and blocked resources can cause drops that coincide with a rollout by chance. Check your own changes first.
How long should I wait before making changes after an update?
Wait until the rollout is marked complete on the Search Status Dashboard, then compare equal date ranges before acting.
Is AI Overviews a Google algorithm update?
No. AI Overviews is a search results feature. It can reduce clicks without changing your rankings.
Sources: Google Search Status Dashboard, Ranking incidents, for confirmed dates and durations from November 2021 to November 2026 (last checked November 12, 2026). Google Search Central announcements and industry reporting for earlier updates. Search Engine Journal, History of Google Algorithm Updates, as a secondary reference.
Related reading
Crawl. Fix. Compare. Improve.
An algorithm update and a broken deployment look the same in a traffic graph. The difference shows up when you compare what Google changed with what your site changed.
Save a baseline before the next rollout, compare every crawl against it, and act on evidence rather than on a date.
Not every drop is Google