Window
2026-09-26 during spam-update wave 1; DemandSphere later marks a branded-AIO jump this day.
Scope
Classic SEO and GEO: Google AI Overviews and AI Mode, Bing Copilot and AI Search, ChatGPT Search, and Perplexity. No Chinese or Baidu sources.
Status
September 2026 spam update in progress (started 2026-09-24 09:15 US/Pacific; Google said up to two weeks).
Confidence
Publisher

Summary

  • GEO: Late-September branded AI Overview expansion begins to show in DemandSphere’s daily series (~69% on Sep 26).
  • SEO: Spam update still rolling; treat tracker spikes cautiously vs GSC.

01

DemandSphere: branded AI Overview presence jumps (~69% on Sep 26)

Publisher

Vendor tracker; Google did not announce a branded-AIO change.

What happened

DemandSphere daily series (covered by SEL 2026-10-01): AI Overviews on tracked branded queries rose to 69.21% on Sep 26 (from mid-20s/30s earlier in September), then higher on Sep 27. Counts presence whether or not the brand is cited. Google issued no product note for the step-change.

Why it matters

Brand SERPs are no longer a safe “AIO-free” zone. Monitor branded queries in GSC + generative AI impressions; narrative may be set by Wikipedia/YouTube/etc. citations.

Source

  1. Search Engine Land — Google AI Overviews jump from 26% to 80% of branded queries

02

Spam update day 3: rollout continues; watch tracker vs human SERPs

Official

What happened

Dashboard still lists the September spam update in progress. Later SEJ/SEOmonitor notes that from ~Sep 26 some rank trackers showed swings people did not see in live search—attributed to incomplete automated SERP returns.

Why it matters

During spam rollouts, prefer Search Console sustained shifts over single-day tracker drama.

Source

  1. Google Search Status — September 2026 spam update incident in progress
  2. Search Engine Journal — Google Completes September 2026 Spam Update After Nearly 14 Days Includes SEOmonitor tracker-noise note from ~Sep 26.

03

Google AI features docs: unchanged

Official

What happened

No material site-owner doc change spotted.

Why it matters

Branded-AIO expansion is a SERP-behavior observation, not a new technical requirement.

Source

  1. Google Search Central — AI features and your website checked

Also noted

SignalDateNote
Chris Long / Nectiv 100-brand AIO spot checklate Sep (reported Oct)93/100 brands showed AIOs in a SerpApi test — ship with Oct 1–2 Ahrefs/SEL coverage

Method notes

  • P0 sites polled via WebFetch/WebSearch; Status Dashboard checked for confirmed ranking/spam state.
  • Rumors kept Unconfirmed until Google/Bing/official confirmation.
  • No Chinese/Baidu sources.