The third and likely final phase of the Google September 2026 spam update began rolling out between October 4 and October 6, 2026, according to Search Engine Roundtable's daily forum recap. Tracking tools recorded elevated volatility in that window; Google has not yet posted a confirmed completion timestamp.

Editor Barry Schwartz wrote on October 6: "I suspect this is it — we are pretty much done with this spam update." He flagged that volatility trackers could see another spike before the rollout closes, but framed the current wave as the final leg.

What changed in Google Search Console?

Google shipped two documented updates on October 6:

• A multi-select country filter in the Performance report. Publishers can check off multiple countries at once and group them, rather than viewing performance one country per query.
• An expanded Search Generative AI control page. The page now documents when a "child property" in Search Console overrides its parent setting for AI controls, clarifying domain-vs.-subdomain behavior.

Both are confirmed Google product changes — distinct from tool-driven speculation.

What did Google say about authorship?

Google published a new warning telling publishers to "avoid using deceptive authorship information" in their content. The post landed alongside updates to the helpful-content documentation, which now includes new definitions for "main content" and additional review-signal sections. Schwartz read the timing as Google's response to recurring 2026 patterns where misleading bylines were used to fake credentials.

How did Google Maps change merchant rules?

Google revised the Google Maps and Business Profiles Prohibited & Restricted Content policy under the "advertising and solicitation" section. The update enumerates what merchants and business owners may not post on listings or posts. The recap does not list the prohibited items individually. Local SEO operators should plan a GBP audit before the holiday window.

What is Google Ads testing on call assets?

Google Ads is running a test that places the advertiser's name inside the click-to-call phone-number call asset on sponsored listings. The standard format shows the number alone. The named variant would give call extensions the same brand-level transparency that other ad formats already carry. Google has not announced a global rollout date.

What did John Mueller say about large product aggregators?

Google's John Mueller answered a forum question about a site Google crawls extensively but indexes sparsely — only four pages — and whose homepage does not appear in the index. Schwartz wrote that "John categorized the site as a 'large product aggregator,'" signaling that Google applies different crawl-budget treatment to this category than to editorial publishers.

A separate Ecommerce SEO data point appeared in the same recap. Brodie Clark posted on X that one store has "2M+ products in the account," an average of one image per product, ~116K products per location, and is "missing ~8 million product images in Google Merchant Center" because the feed itself is incomplete. The gap sits in the feed, not the on-site pages.

What is OpenAI testing on product results?

OpenAI began testing new labels appended to ChatGPT product results. Schwartz listed the visible examples: "best all-rounder," "best for beginners," and "best cushioning." The format attaches editorial-style categories to AI-curated shopping listings and overlaps with Google's own treatment of product-result snippets.

What's next to monitor?

• Google's spam-update confirmation page for the official "completed rolling out" stamp.
• Author and review-signal audits during the November 2026 helpful-content cycle, given Google paired the warning with the documentation update.
• The Google Ads call-asset test expanding beyond its pilot cohort.
• A GBP content sweep on Maps listings before Q4 ad spending peaks.
• OpenAI's product-label test, since editorial framing inside AI shopping results raises fresh disclosure questions for affiliate and commerce publishers.