Algorithm Updates

Google changes its ranking systems thousands of times a year. Most changes are invisible: a quiet weight adjustment here, a model retrain there. But a handful each year are big enough to reshuffle entire niches, and Google announces those. Understanding what each kind of update is for, and what recent ones have looked like, is one of the fastest ways to build SEO judgement that actually lasts.

The update landscape#

Where to watch, in order of authority:

1. The Search Status Dashboard: the official list of ranking updates with start and end times. (The old developers.google.com/search/updates/ranking URL now redirects here.)
2. The Search Central Blog and the documentation changelog, for policy changes that never appear as a numbered "update".
3. Google Search Central's social accounts, which usually post when a rollout starts.

Everything else, including volatility trackers and forum threads, is commentary.

Core updates: the pattern#

Core updates are Google's periodic recalibration of how its systems assess content. Google's own description: they are "broad in nature, and don't target specific sites or individual web pages." They re-evaluate how well existing content satisfies users compared with everything else in the index. Pages that move down "aren't necessarily bad"; something else may simply have become a better answer.

Two changes in the last year matter for how you think about core updates:

• Smaller core updates are now documented. In December 2025 Google added to its core updates page that it continually makes "smaller core updates" that "are not announced because they aren't widely noticeable, but they are another way that your content can see a rise in position (if you've made improvements)." John Mueller summarised it in August 2026: many systems update continuously, and Google tries to announce the bigger, broader changes.
• Core updates can be surface-specific. The February 2026 Discover core update was the first core update for one surface only. It aimed to show more locally relevant content from sites in the user's country, less sensationalism and clickbait, and more in-depth, original, timely content from sites with expertise, judged topic by topic. It applied to US English only; Google said it would expand to other countries and languages, but no expansion had been confirmed as of 5 October 2026. See Google Discover.

Confirmed updates, January 2025 to October 2026#

Every ranking update on the Search Status Dashboard in this window. There were no confirmed updates between 1 January and 12 March 2025, and no link spam, helpful content or reviews updates at all.

Unconfirmed volatility#

Rank trackers also lit up in January 2026, on 19 June 2026, and between 4 and 13 September 2026 (drops that reversed), with no confirmation from Google. In early February 2026, SEOs reported drops for "self-promotional listicles" where a brand ranks itself #1 in a "best X" list; Google did not confirm an update, but a spokesperson said in April 2026 that it is "aware of the low-quality listicle content" and works to combat it. Note these, but don't diagnose against them.

The updates that shaped modern SEO#

For context, the milestones that got us here:

Panda (2011): the first major content-quality update. Targeted thin, duplicate and low-quality pages. Content farms saw their traffic evaporate.

Penguin (2012): hit paid links, link networks and anchor-text stuffing. Became part of the core algorithm, running in real time, in 2016.

Helpful content system (2022): introduced a site-wide classifier for content written for search engines rather than people. The September 2023 helpful content update caused dramatic drops in affiliate, travel and finance niches.

March 2024 core update and new spam policies: helpful content was folded into the core ranking systems, and three spam policies arrived: scaled content abuse, expired domain abuse and site reputation abuse. Google said on completion that results showed 45% less low-quality, unoriginal content. The rest of 2024 brought core updates in August, November and December and spam updates in June and December.

Site reputation: the policy that changed most#

Site reputation abuse (sometimes called "parasite SEO") is publishing third-party content on an established site mainly to borrow that site's ranking signals: think coupon, casino or payday-loan sections bolted onto a news or university domain. Its story since 2024:

1. March 2024: policy announced; manual actions began on 5 May 2024.
2. November 2024: Google clarified that using third-party content to exploit a host's ranking signals violates the policy regardless of first-party involvement or oversight.
3. 13 November 2025: the European Commission opened a Digital Markets Act investigation into whether the policy unfairly demotes publishers that work with commercial partners.
4. 28 August 2026 (effective 30 August): following discussions with the Commission, Google renamed it the site reputation policy and split enforcement by searcher location:
   • Outside the EEA, violating sections can still receive a manual action. The rest of the site is unaffected.
   • Inside the EEA, there is no manual action effect. The section "may be categorized as separate from the main domain" so it ranks on its own merits. Google lifted all previous EEA manual actions under the policy.
   • Reviews now weigh named factors: whether the content's presentation is consistent with the host, whether its quality matches, whether authorship is stated, and whether it appears near-identically on other sites. Eligible sites can take disputes to mediation after a reconsideration request.

It is the first Google spam policy enforced differently depending on where the searcher is. If you publish partner content, integrate it editorially, name its authors, and keep it to your normal quality bar.

Other policy changes to know (2025 to 2026)#

• Spam policies cover AI answers (15 May 2026). Google's definition of spam now includes "attempting to manipulate generative AI responses in Google Search". Its AI optimization guide adds that pages built for every query variation or fan-out query to manipulate rankings or AI responses count as scaled content abuse.
• Back button hijacking became an explicit spam policy (announced 13 April 2026, enforced from 15 June 2026). Check third-party ad and recommendation scripts, which can cause it without you knowing.
• Spam reports can trigger manual actions (14 April 2026). Google may now act on user spam reports and forward the report text to the site owner verbatim.
• UK advance notice. In June 2026 the UK CMA imposed a fair-ranking conduct requirement on Google, including advance notice of significant ranking changes, with six months to comply. Watch for how Google implements it.

Diagnosing your own drop#

Not every traffic drop is an algorithm update. Before you panic, work through this in order:

1. Confirm it was an update, and that it has finished#

Match your drop against the Search Status Dashboard. Google recommends waiting at least a full week after a core update completes, then comparing a week after with a week before the rollout started. A date mismatch usually means a technical issue, seasonality or a competitor who got better. Rule out tracking artefacts too: the September 2025 &num=100 change cut reported impressions for most sites without losing a single real visitor (see Your SEO Toolkit).

2. Find what moved#

In Search Console, compare the periods by page and by query, and analyse search types (Web, Images, Video, News) and Discover separately. A site-wide slide points to a site-wide quality signal; a cluster-specific drop usually means one topic area or template. Google's rule of thumb: a small drop (position 2 to 4) needs no drastic action; a large drop (4 to 29) needs a deeper assessment.

3. Match to the update's purpose#

Core update: a relative quality and relevance reassessment. Spam update: something on your site, or your link profile, matches a spam policy. Discover-only drop: check the Discover update's goals. Every major update is documented by the SEO community, but weigh that against what Google actually said.

4. Ask the hardest question honestly#

Would you recommend this page to a knowledgeable friend? If the answer involves any hesitation ("well, it covers the basics..."), that's your diagnosis. Google's helpful content self-assessment asks the same question in more detail.

5. Fix before you publish more#

The classic mistake: adding new content on top of the same weak foundation. Improve what's there first. Google calls deleting content "a last resort", but notes that if whole sections were made for search engines rather than people, removing them can help the good content perform better. See Content Pruning and Content Refresh & Decay.

Spam updates: a different beast#

Spam updates target manipulation, not quality. Signs you got hit:

• Sharp, sudden drop that lines up with a confirmed spam update
• Link profile changes: lost links you were relying on (Google says it may ignore all outgoing links from a site that links manipulatively)
• Pages removed from the index entirely, not just ranking lower
• A notice in Search Console under Security & Manual Actions → Manual actions

The update-proof approach#

No one predicts update timing. But you can make updates irrelevant by having nothing for them to target:

Build real expertise. If your authors aren't genuinely qualified to write what they're writing, fix that upstream: bring in real experts or stick to topics you actually know. See E-E-A-T & Quality Guidelines.

Make your brand searchable. Branded search, genuine mentions in your niche and press coverage are the kinds of signals that durable sites share. Earn them; Google's 2026 AI guidance warns that inauthentic, manufactured "mentions" aren't as helpful as they seem.

Run content quality cycles. A regular review that improves or consolidates weak content keeps your site's overall quality high. Google's ranking systems work mainly on pages but also use site-wide signals, so a large cluster of thin pages can still hold the rest back.

Don't chase tactics. Every major update in SEO history followed mass exploitation of a shortcut, from link networks to scaled AI pages to self-ranking listicles. Treat any "this is working right now" tactic with proportional suspicion.

Recovering after an update#

Recovery is slow, but you no longer have to wait only for named updates. Google says some improvements can take effect in days, while it "could take several months" for its systems to confirm a site is consistently helpful; unannounced smaller core updates can reflect improvements in between. And there is "no guarantee" of recovery.

Realistic recovery plan:

1. Diagnose and fix the underlying issue
2. Substantially improve, consolidate or (as a last resort) remove the weak content
3. Annotate the changes in Search Console and request indexing for key URLs
4. Watch for gradual movement, not just the next named core update
5. Budget months, not weeks, for major drops

The sites that recover fastest are the ones that don't spend those months trying to convince themselves the diagnosis was wrong.

Back to basics: E-E-A-T & Quality Guidelines, the framework behind every quality-based update.