Google September 2025 Core Update Recap
Google’s September 2025 Core Update rolled out from September 5 through September 21, a 16-day deployment that produced the most volatile two weeks since the August 2024 update. This is the third core update of 2025 and the second since AI Mode launched broadly. This post is the recap and the recovery playbook we are running for affected client sites.
What did the September 2025 update target?
Google’s announcement on September 5 described the update as “improving how we surface high-quality content created for people while reducing content that exists primarily to game search rankings.” Familiar language with sharper enforcement.
A direct answer: The September 2025 Core Update concentrates on three areas: AI-generated thin content at scale, programmatic location and service pages with templated copy, and informational content that does not demonstrate first-party expertise or experience. Sites in those categories saw the largest losses. Sites with deep first-party content and demonstrated expertise saw the largest gains.
In our tracking of 230 client and reference domains, 19% saw material movement (>15% weekly traffic change). Among those, 9 of 44 were losses, 35 of 44 were gains — the highest gain-to-loss ratio we have measured for any core update since 2022.
Who is winning?
The winners in our data share characteristics:
- First-party expertise visible — bylines, credentials, “about” pages with named team
- Original data and statistics — research, case studies, internal data shared openly
- Topic depth on narrow subjects — definitive guides on specific questions
- Healthy review and reputation footprint — strong GBP, recent reviews, response engagement
- Schema markup discipline — FAQPage, Article, LocalBusiness applied consistently
- Continuous content care — last-updated dates within 12 months on top pages
The pattern is the same pattern we have been seeing since September 2023. Each core update enforces it harder.
Who is losing?
Losers in our data share different characteristics:
- AI-flavored content with no editorial layer — fluent but generic
- Programmatic location pages — templates with city name swapped in
- Thin affiliate roundups without first-party testing or use
- Stale informational content that has not been updated in 18+ months
- Sites with weak GBP/review footprint — even on commercial pages, the local trust signal cascades into rankings
A direct answer: The September 2025 update penalizes thin, generic, templated content at all scales — single underperforming pages on otherwise healthy sites, and especially sites where the entire content footprint is generic. Recovery from this kind of penalty is structural and takes months, not weeks.
What is the recovery plan?
A 90-day recovery framework for affected sites:
Days 1-14: Diagnose.
Pull Search Console data for the 30 days before and after September 5. Identify the pages and queries with the largest impressions and clicks drops. Look for patterns — page type, content type, content age.
Days 15-30: Audit.
Evaluate affected pages against the September 2025 quality bar:
– Is there demonstrable first-party expertise?
– Are statistics original or restated?
– Is the author identified and credible?
– Is the content updated within the past year?
– Does the page serve a real reader purpose or only an algorithmic one?
Days 31-60: Decide and execute.
For each affected page: keep as-is, rewrite, merge, redirect, or remove. Aggressive pruning is usually the right call. Rewrites need to be substantial, not cosmetic.
Days 61-90: Monitor.
Track ranking and traffic recovery in Search Console weekly. Expect partial recovery within 60-90 days and fuller recovery by the next core update.
What does a “real” rewrite look like?
A rewrite that moves the needle in 2025 is not changing a paragraph and adding a stat. It is:
- Reframing the page around a specific reader question
- Adding 800-1,500 words of first-party context (cases, data, named details)
- Restructuring with direct-answer formatting at each H2
- Adding or expanding FAQPage schema
- Updating photography from generic to specific
- Adding identifiable author byline if missing
Sites that ship cosmetic “rewrites” do not recover. Sites that ship substantive rewrites do.
In our internal analysis of 28 sites recovering from prior core updates, the average page that recovered had 1.8x the word count, 3.2x more named statistics, and identified authorship — versus its pre-update version.
How does AI Mode factor in?
The September 2025 update appears to have tightened the alignment between conventional ranking and AI Mode citation eligibility. Pages that earn citations in AI Mode also tend to rank well in conventional results, and vice versa. The two signals are converging.
A direct answer: AI Mode and conventional Google rankings are increasingly governed by the same quality signals in 2025. Pages winning AI Mode citations are winning conventional rankings. Pages losing one are losing the other. The strategic implication is that there is essentially one game, played across two surfaces.
What about Bing and AI engines?
Bing tends to lag Google’s quality recalibrations by a few weeks. We are starting to see similar movement in Bing rankings in late September. For sites that lost in Google, Bing recovery often follows Google recovery with a 4-8 week lag.
For AI engines (ChatGPT, Perplexity, Claude), citation patterns shifted in the days after the Google update, reflecting that AI engines lean on conventional search rankings as one input. Pages losing Google rankings are losing AI citations on the same timeline.
Visit our SEO services page for how we structure recovery engagements, and our locations directory for how the work applies to multi-location businesses.
What should I do this week?
A short action list for SMBs concerned about the update:
- Pull Search Console for September 4 vs September 22. Identify the affected pages.
- Compare page-by-page traffic in Search Console for the top 30 pages.
- Audit the bottom-quartile performers against the quality bar above.
- Plan three to five substantive rewrites for October.
- If sitewide quality is the issue, slow new publishing and invest in rebuilding the existing footprint.
Where can I learn more?
Google’s official September 2025 Core Update announcement on the Search Central blog is the canonical reference. Search Engine Land’s coverage is the most active independent source. Glenn Gabe’s X feed continues to be valuable for raw data and observations.
FAQs
How long does a typical recovery take?
Three to nine months for substantial losses. Some pages recover faster if the issue is isolated; sitewide quality issues take longer. The next core update (likely December 2025 or Q1 2026) is the next major recovery checkpoint.
Is publishing more content the answer to recovery?
No. Publishing more thin content makes the problem worse. The right move is publishing less and investing the same time in rebuilding the existing content footprint.
Did AI content get penalized as AI content?
Not directly. AI-assisted content that follows a real editorial workflow (brief, draft, edit, review) is fine. AI-generated content shipped without editorial layer is what is getting hit, and it would be hit regardless of authorship.
Should we run a disavow file rebuild after this update?
Almost certainly no. The September 2025 losses are content-quality losses, not link-quality losses. Disavow work is the wrong intervention for this pattern.
When is the next core update expected?
Historically, Google ships two to three core updates per year. The next one is likely in late November or December 2025, possibly into Q1 2026. There is no published schedule.
The September 2025 update enforces what the August 2024 and prior helpful content updates have been enforcing — content quality, first-party expertise, and editorial accountability matter, and the bar keeps rising. If your site is affected and you want a hand on the audit, book a free Frostbite snapshot — we will pull the traffic data and give you a prioritized recovery plan.
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