Google has run four spam updates in 2026. What they mean for an AI-assisted content programme
Google's fourth spam update of 2026 began on 24 September and may take two weeks. How to read it in your data, and what it means for AI-assisted content.
The short answer
Google's spam updates do not target AI-written pages as such. They target pages made at scale to rank without helping anyone, however they were produced. For an AI-assisted programme, the practical job this month is to wait for the September rollout to finish, then check which sections moved and why before changing anything.
Key takeaways
- Google began its September 2026 spam update on 24 September, the fourth spam update of the year, with a global rollout that may take up to two weeks.
- The three earlier spam updates of 2026, in March, June and August, each finished within about three days, so this rollout is long by this year's standard.
- Google's scaled content abuse policy covers pages made mainly to manipulate rankings whether people, automation or both produced them, so the method of writing is not the test.
- A drop concentrated in templated or thin sections points to a spam-policy issue; a drop spread evenly across the site points to another cause, such as a core update or seasonality.
- Do not judge an update while it is still rolling out; compare two full weeks after Google marks it complete with the two weeks before it began.
In this article
What has Google released this year?
Google has released four spam updates in 2026, and the latest is still rolling out. Its Search Status Dashboard lists the September 2026 spam update as starting on 24 September, after spam updates that began on 24 March, 24 June and 18 August.1 The same list shows two core updates, starting on 27 March and 21 May.1
Google's announcement said the September update applies globally and to all languages, and that the rollout may take up to two weeks to complete.2 Search Engine Roundtable, which reported it, noted that each of the year's three earlier spam updates finished in a couple of days.2 On the dashboard, the August update ran from 18 to 21 August.1
Neither the August nor the September announcement named the spam policies in focus, and Search Engine Roundtable reported that neither was a link spam update.23 So the useful question for a site owner is not what Google targeted, but how to tell whether a change in traffic came from this update at all.
Google's ranking updates, 2026 so far
March 2026 spam update, finished within a day
March 2026 core update
May 2026 core update
June 2026 spam update, about two days
August 2026 spam update
September 2026 spam update begins; up to two weeks
Do spam updates target AI-written content?
No. Google's rule is about purpose and value, not authorship. Its guidance from February 2023 says it rewards high-quality content however it is produced, and that using automation mainly to manipulate rankings breaks its spam policies.4
The policy that matters most arrived in March 2024. Google named scaled content abuse as a spam practice: many pages generated mainly to manipulate rankings rather than help people, whether made by automation, by people or by both.5 The same announcement added policies on expired domain abuse and site reputation abuse.5
We covered the authorship question, and what makes an AI-assisted page worth citing, in our September explainer on AI-written content. This post is about the update itself: what to watch while it rolls out, and how to read the result.
Why a two-week rollout changes how you read the data
A longer rollout means a longer stretch in which rankings move for reasons you cannot yet separate. The spam updates in March, June and August each settled within about three days, so a before-and-after check could start almost at once.1 This one may run until early October.
Search Engine Roundtable asked Google about the longer window, and John Mueller replied that it was likely to take longer than some of the previous ones.2 Google did not explain why. A longer rollout can mean a broader change, or simply a slower release, and the announcement does not say which.
Our view: treat the whole window as noise. Rankings shift daily during a rollout and early movement often reverses. Any change you make to content while it runs will be mixed up with the update, and you will not know which one moved the needle.
How to tell a spam-update drop from something else
Look at where the loss sits before looking at any single page. Spam systems act on patterns, so a spam-related drop tends to cluster in the sections that share one.
| What you see | Likely reading | What to check first |
|---|---|---|
| Losses concentrated in one templated section | Possible scaled content issue | How many pages share the template, and what each adds |
| Losses on pages hosting partner or affiliate content | Possible site reputation issue | Who writes those pages and who controls them |
| An even drop across the whole site | Probably not spam | Seasonality, tracking changes, a core update |
| Drops that began before 24 September | Not this update | What changed on the site or in demand earlier |
| A manual action notice in Search Console | A reviewer acted, separate from the update | The policy named in the notice |
Illustrative. Our triage order, not a Google procedure.
Manual actions sit apart from updates. Google said on 28 August that, after discussion with the European Commission, manual actions under its site reputation policy would affect search results differently in the European Economic Area from 30 August.6 Outside the EEA, such an action still affects the part of the site concerned, and site owners are still notified in Search Console.6
Where AI-assisted programmes are exposed
An AI-assisted programme is exposed when its output looks like the pattern the policy describes. The test is the set of pages, not any single one.
- Template variants. Hundreds of pages that swap a product, place or industry name into the same text, with nothing specific to each.
- Publishing faster than anyone reads. A pace set by the tool's output rather than by editors' capacity, so errors and sameness go unchecked.
- Hosted third-party content. Content placed on a trusted site to borrow its reputation, which Google treats under its site reputation policy.
Our view: the useful question is not "did AI write this?" but "would we publish this page if nobody could see the traffic?" Sigzen AI's own posts are drafted with AI from sources our editors choose, then fact-checked and edited by people, at a pace the editors can keep.
What to do once the rollout completes
Compare like with like, then act on sections, not pages. Take the two full weeks after Google marks the update complete and set them against the two weeks before 24 September, by section and by template.
After the update: a review in five steps
- Confirm completion
Wait for the completion date on the dashboard before drawing conclusions.
- Compare equal windows
Two full weeks after against the two weeks before 24 September.
- Group by section
Sort losses by template and folder, not by individual URL.
- Read the losing pages
Ask what each one adds that the pages ranking above it do not.
- Merge, rewrite or remove
Fix the weakest section first, then wait for the systems to re-assess.
Expect recovery to be slow if a section was hit. Google's guidance, quoted by Search Engine Roundtable, says changes may help a site improve once its automated systems learn over a period of months that the site complies.2 That is a reason to fix the pattern properly once, rather than tweak pages week by week.
Keep AI answers as a separate measurement. Engines that cite your pages may react to the same changes at a different pace, or not at all. Our note on how rankings and AI Overview citations overlap explains why the two drift apart. Our AI visibility work tracks citations across six engines so that a ranking change and an answer change are not confused.
Sources
- Google Search Status Dashboard, ranking updates history (Sep 2026)
- Search Engine Roundtable, Google September 2026 spam update (Sep 2026)
- Search Engine Roundtable, Google August 2026 spam update (Aug 2026)
- Google Search Central, Google Search's guidance about AI-generated content (Feb 2023)
- Google Search Central, March 2024 core update and new spam policies (Mar 2024)
- Google Search Central, update to the site reputation policy (Aug 2026)
