Every Google Algorithm Update in 2025 and 2026: What Changed and What to Publish Now

Between January 2025 and the end of September 2026, Google confirmed eleven separate ranking updates to Search — a pace that genuinely outstrips almost any prior two-year stretch in the platform’s history. If you publish content for a living, or your business depends on organic traffic in any way, understanding what each of these updates actually targeted, in order, tells you considerably more about what to publish going forward than any single piece of update-day advice ever could.

Why Tracking the Full Timeline Genuinely Matters More Than Any Single Update

Reacting to one update in isolation tends to produce reactive, short-term content decisions. Looking at eleven updates in sequence reveals the actual, sustained direction Google has been pushing Search toward — and that direction has been remarkably consistent even as individual updates target different specific issues.

2025: Three Core Updates and One Spam Update

March 2025 Core Update (March 13 – March 27)

The first core update of 2025 rolled out over roughly two weeks, aimed broadly at demoting low-value and spam-adjacent pages while promoting genuinely relevant, high-quality content. Reporting at the time noted forums experienced significant recalibration and that programmatic, mass-produced content took a noticeable hit.

June 2025 Core Update (June 30 – July 17)

Google’s second core update of the year rolled out over the July 4th holiday period in the United States and ran about 17 days. Coverage at the time noted particularly large swings for YMYL sites — Google’s shorthand for Your Money or Your Life topics like health, finance, and legal content — along with some genuine recoveries for sites that had been hit by earlier updates.

August 2025 Spam Update (August 26 – September 22)

The only spam update confirmed in 2025 ran unusually long — roughly 27 days by some tracking, making it one of the longer spam rollouts on record. Unlike some spam updates, this one reportedly left link spam and site reputation abuse largely untouched, focusing instead on other categories of policy violation.

December 2025 Core Update (December 11 – December 29)

The year’s third and final core update closed out 2025 over an 18-day rollout spanning the holiday period — a timing that genuinely complicates diagnosis for any site owner trying to separate normal holiday traffic fluctuation from actual algorithmic impact.

2025 at a Glance

Update	Type	Dates	Duration
March 2025 Core	Core	Mar 13 – Mar 27	~14 days
June 2025 Core	Core	Jun 30 – Jul 17	~17 days
August 2025 Spam	Spam	Aug 26 – Sep 22	~27 days
December 2025 Core	Core	Dec 11 – Dec 29	~18 days

 

2026: A Genuinely Faster, Busier Year

If 2025 felt active, 2026 has genuinely accelerated further. By the end of September, Google had already confirmed seven separate ranking updates — more than 2025’s full-year total — plus a new category of update that had never existed before.

February 2026 Discover Core Update (February 5 – February 27): A Genuine First

This was the first core update in Google’s history scoped specifically to Google Discover — the content feed shown on Android phones and in the Google app — rather than traditional web search. It ran about three weeks and applied initially only to English-language users in the United States. Google indicated the update aimed to surface more locally relevant content and reduce sensational, clickbait-style material from the feed, and clarified that Discover now evaluates topical expertise on a topic-by-topic basis rather than judging a whole site’s expertise as one blanket signal. For publishers, one concrete practical detail stood out: Discover now reportedly requires images at least 1,200 pixels wide, with 1,600 pixels at a 16:9 ratio recommended, for full visibility in the feed.

March 2026 Spam Update (March 24 – March 25): The Fastest Ever Recorded

At roughly 19.5 hours, this became the fastest confirmed spam update rollout on Google’s own Search Status Dashboard. Google described it simply as a normal spam update, but it specifically expanded enforcement against three categories: scaled AI-generated content abuse, expired-domain manipulation, and site reputation abuse, also known as parasite SEO, where a strong, established domain hosts weak third-party content purely to borrow its ranking authority.

March 2026 Core Update (March 27 – April 8): New Technical Signals

Beginning just two days after the spam update completed, this core update reportedly introduced what several trackers describe as the most significant technical ranking signal change since the original Helpful Content system: a shift toward holistic Core Web Vitals scoring, meaning Google began aggregating Largest Contentful Paint, Interaction to Next Paint, and Cumulative Layout Shift into one composite performance score rather than evaluating each metric in isolation.

May 2026 Core Update (May 21 – June 2): Heavy, Sustained Volatility

Running just under 12 days, this update was reported to bring a fast start followed by several distinct further waves of ranking volatility, rather than settling immediately, making it one of the more genuinely disruptive updates of the year for sites that were affected.

May 15, 2026: Spam Policy Reaches AI Answers

Separate from a named core or spam update, Google extended its spam policies specifically to cover manipulation of AI-generated answers and AI Overviews, treating attempts to game AI-summarized results the same way it has long treated attempts to game traditional blue-link rankings.

June 2026 Spam Update (June 24 – June 26): Quick and Global

A short, roughly two-day rollout that Google again called a normal spam update, reaching all languages and regions without introducing any new spam policy categories beyond what was already in force.

June 16, 2026: Back Button Hijacking Becomes an Explicit Spam Policy

Google added a specific, named policy against websites that interfere with a browser’s Back button — a manipulative pattern where a site traps visitors by hijacking normal browser navigation to keep them from leaving, now explicitly classified as a spam violation rather than left to general quality judgment.

August 2026 Spam Update (August 18 – August 21): Another Fast Global Pass

Running just under three days, this update was global across all languages and, notably, did not specifically target link spam or site reputation abuse, suggesting Google rotates which specific spam categories each individual update emphasizes rather than re-enforcing every category every time.

September 2026: A Spam Update and a Core Update, Back to Back

Google’s September 2026 spam update began rolling out September 24, with the rollout expected to take roughly two weeks and notably high volatility reported between September 25 and 27. Separately, Google also completed a core update that had begun September 12, finishing September 26 — meaning late September 2026 saw sites potentially affected by two distinct, overlapping ranking systems within the same short window.

2026 at a Glance

Update	Type	Dates	Duration
February 2026 Discover Core	Discover Core	Feb 5 – Feb 27	~21 days
March 2026 Spam	Spam	Mar 24 – Mar 25	~19.5 hours
March 2026 Core	Core	Mar 27 – Apr 8	~12 days
May 2026 Core	Core	May 21 – Jun 2	~12 days
June 2026 Spam	Spam	Jun 24 – Jun 26	~2 days
August 2026 Spam	Spam	Aug 18 – Aug 21	~3 days
September 2026 Core	Core	Sep 12 – Sep 26	~14 days
September 2026 Spam	Spam	Sep 24 – ongoing	~2 weeks expected

 

What a Core Update Actually Does, in Plain Terms

A core update reassesses broad content quality and relevance signals across the entire index at once — expertise, trustworthiness, how genuinely useful a page is to the person searching. It doesn’t target a specific violation; it re-ranks based on Google’s evolving overall definition of what “good” looks like, which is precisely why core updates can affect sites with no manipulative intent whatsoever.

What a Spam Update Actually Does, in Plain Terms

A spam update, by contrast, specifically enforces Google’s published spam policies against identifiable violations: cloaking, hidden text, scaled AI-generated content with no genuine originality, expired-domain abuse, site reputation abuse, and now, as of 2026, manipulating AI answers and hijacking browser navigation. Genuinely original sites with no manipulative tactics have considerably less to fear from these specifically.

What a Discover Update Does Differently

Discover updates affect a separate content feed from traditional search results, with its own ranking logic emphasizing freshness, local relevance, and now, as of February 2026, topic-specific expertise evaluation and stricter image-size requirements. A site can perform well in traditional search while underperforming in Discover, or vice versa, since the two systems now genuinely diverge more than they used to.

The Clear Pattern Across Eleven Updates

• AI-generated content with no genuine human oversight is under increasing, explicit enforcement, not just informal discouragement
• Technical performance, now measured holistically rather than metric-by-metric, genuinely matters more than it did entering 2025
• Manipulative UX patterns, like back-button hijacking, are being individually named and banned rather than left to general judgment
• Discover is being treated as its own distinct ranking environment with its own explicit rules, not a side effect of regular search ranking
• The gap between core updates and spam updates has narrowed, with less than three weeks separating several consecutive 2026 rollouts

What to Actually Publish Going Forward

1. Write content with genuine, demonstrable firsthand expertise or original research — the exact opposite of scaled AI content with no human oversight
2. Meet Discover’s specific image-size requirements (1,200px minimum width, 1,600px at 16:9 recommended) on anything meant to reach that feed
3. Treat Core Web Vitals as one combined, holistic score to optimize, not three separate numbers to chase independently
4. Avoid any UX pattern that traps or redirects visitors against their own navigation intent
5. Build genuine topical depth in specific subject areas rather than shallow coverage spread across unrelated topics, since Discover now judges expertise topic by topic

How This Connects to Broader Content Strategy

None of these eleven updates rewards a fundamentally different strategy than the one already covered in our guide to why helpful content still wins — genuine expertise, real originality, and content built for actual readers first. What’s changed across 2025 and 2026 is how specifically and aggressively Google now enforces that standard, not the standard itself.

A Practical Monthly Monitoring Habit

Rather than scrambling reactively when volatility hits, check Google’s own Search Status Dashboard on a fixed monthly schedule, and cross-reference any traffic movement you see against confirmed dates before assuming it’s update-related versus a seasonal or content-specific issue. For deeper technical breakdowns of individual updates as they roll out, Search Engine Land’s algorithm update coverage remains one of the more consistently reliable ongoing sources.

Why Waiting Out a Rollout Genuinely Beats Reacting Mid-Update

Several of the updates above, particularly the longer core updates, showed multiple distinct waves of volatility before settling into their final impact. Making dramatic content or technical changes three days into an 18-day rollout risks solving a problem that either doesn’t exist yet or was going to resolve on its own once the update genuinely completed.

What Smaller Sites Specifically Should Take From This

Smaller, newer sites genuinely benefit from the same pattern larger publishers do: none of these eleven updates specifically targeted site size or age. The sites that struggled repeatedly across 2025 and 2026 shared identifiable traits — thin AI-generated content, manipulative technical patterns, weak Core Web Vitals — not simply being small. For a related look at how one specific recent update affected link-building and guest posting practices, see our breakdown of the September 2026 spam update.

Why Google Is Confirming Updates More Often Now Than in Prior Years

Tracking data shows a genuine acceleration: 2021 and 2022 each saw around ten confirmed updates, 2023 saw nine, 2024 saw seven, and 2025 dropped to just four confirmed updates — yet 2026 has already surpassed that full-year 2025 total within nine months. Part of this reflects Google genuinely confirming fewer minor updates while still running thousands of unannounced changes constantly, and part reflects a real strategic shift toward shorter, more frequent, more specifically targeted spam updates rather than infrequent, sweeping ones.

Why Shorter Spam Update Rollouts Are Becoming the New Normal

The trend from a 27-day spam rollout in August 2025 down to a 19.5-hour rollout in March 2026, then roughly two-to-three-day rollouts for the June and August 2026 spam updates, suggests Google’s spam-detection systems have genuinely gotten faster at identifying and acting on violations at scale. For site owners, this means less time to observe gradual warning signs before a spam-related ranking change fully takes effect — reinforcing why staying compliant continuously matters more than trying to time changes around anticipated rollout windows.

How YMYL Content Has Been Affected Across This Period

Your Money or Your Life content — anything touching health, finance, legal, or safety topics where inaccurate information can genuinely cause real harm — was specifically called out as seeing larger swings during the June 2025 core update, and YMYL content has historically absorbed the largest impact from nearly every major core update Google has run. If your site covers any YMYL-adjacent topic, treating author credentials, sourcing, and factual accuracy as genuinely non-negotiable matters more with each successive update, not less.

What Changed Specifically for Ecommerce Sites

Ecommerce brands were specifically flagged as affected by the March 2026 core update’s shift toward holistic Core Web Vitals scoring, given how heavily product pages typically lean on images, scripts, and third-party tracking tags that can degrade loading performance and interactivity. Product pages with unnecessarily heavy image loads, slow third-party review widgets, or layout shifts caused by late-loading promotional banners are genuinely more exposed under this combined scoring approach than they were under the old metric-by-metric evaluation.

Understanding Site Reputation Abuse, Specifically

Site reputation abuse, also called parasite SEO, involves a well-established, trusted domain hosting weak, often unrelated third-party content specifically to borrow that domain’s existing search authority — for example, a respected news site running a poorly-vetted “coupon” or “reviews” section produced entirely by an outside partner purely for ranking purposes. This was explicitly named as a target of the March 2026 spam update, continuing enforcement that Google first formalized as a distinct policy back in 2024.

What Expired Domain Manipulation Actually Looks Like

This practice involves purchasing a domain that previously held genuine content and search authority, then repurposing it entirely for unrelated content specifically to inherit its existing rankings and backlink profile — a tactic explicitly named as a March 2026 spam update target. Genuine businesses acquiring an existing domain for legitimate reasons should ensure the new content genuinely relates to why that domain built its original authority, rather than treating the acquisition as a pure ranking shortcut.

Why AI Overview Manipulation Became Its Own Policy Category

As AI-generated summaries became a more prominent part of the search results page throughout 2025 and into 2026, attempts to manipulate what those summaries say or which sources they cite genuinely grew alongside that prominence. The May 15, 2026 policy extension treats this exactly like traditional ranking manipulation: attempting to game an AI Overview’s output carries the same enforcement risk as attempting to game a traditional ranked result.

A Deeper Look at Why Back-Button Hijacking Specifically Drew a Named Policy

Sites that intercept a visitor’s Back button press — redirecting them to another page, opening a pop-up, or otherwise blocking the expected return to search results — create a genuinely deceptive experience that undermines trust in search generally, not just in the specific offending site. Naming this pattern explicitly, rather than leaving it to general quality judgment, gives Google a clearer, faster enforcement path and gives site owners a considerably clearer line not to cross.

How to Build Your Own Update-Resilience Checklist

1. List every page template on your site and confirm none uses manipulative navigation patterns
2. Audit any AI-assisted content for genuine human review, fact-checking, and original insight before publishing
3. Run a holistic Core Web Vitals check across your most important templates, not just your homepage
4. Confirm any images intended for Discover meet the 1,200px minimum width requirement
5. Review any third-party or syndicated content sections for genuine site reputation abuse risk
6. Set a recurring calendar reminder to check Google’s Search Status Dashboard monthly, not just during a visible traffic drop

What This Means If You’re Planning Content for Late 2026 and Beyond

Given the accelerating pace confirmed through September, expecting at least one more update before year-end is a reasonable planning assumption, consistent with the pattern of a final core or spam update landing in November or December in both 2024 and 2025. Building genuine expertise, technical performance, and honest UX into your publishing process now, rather than after the next update lands, remains the only strategy that has held up across all eleven confirmed rollouts so far.

Frequently Asked Questions

How many Google algorithm updates were confirmed across 2025 and 2026?

Eleven total through the end of September 2026: four in 2025 and seven in 2026, plus two policy-only changes (the May and June 2026 spam policy additions) that weren’t tied to a named rollout.

What’s the difference between a core update and a spam update?

A core update broadly reassesses content quality and relevance across the entire index; a spam update specifically enforces identifiable policy violations like cloaking, scaled AI abuse, or manipulative navigation patterns.

Does a Discover update affect regular Google Search rankings too?

Not necessarily — the February 2026 Discover update was explicitly scoped only to the Discover feed for US English users, separate from traditional web search rankings.

What should I do if my traffic drops during a confirmed update window?

Check the confirmed dates against your own analytics first, avoid dramatic reactive changes until the rollout genuinely completes, and review your content against the patterns — AI-content quality, technical performance, manipulative UX — that these updates have consistently targeted.

The Bottom Line

Eleven confirmed updates across 2025 and 2026 tell a consistent story: Google is enforcing genuine expertise, technical quality, and honest user experience more specifically and more frequently than ever before, while the actual underlying standard — content that genuinely helps real people — hasn’t fundamentally changed at all. Publishing with that standard in mind protects you against whichever specific update comes next, without needing to predict its exact focus in advance.