SEO Recap covering October 15, 2026: Google's AI Mode link updates and a ChatGPT tracking bug

Built by Stephanie Chung·5 min read·6 stories

Daily summary of what matters in SEO, GEO, AEO, and AI search generated with Claude Code (beware of hallucinations)

Generative Engine Optimization (GEO) & Answer Engine Optimization (AEO)

Graphite found ChatGPT-attributed GA4 sessions fell 22-57% starting Oct 9, roughly 45% below baseline, while LLM Pulse measured ~46% fewer ChatGPT sessions Oct 9-11 with total site traffic holding steady.
The cause: after the GPT-6 rollout, ChatGPT began opening inline answer links without the utm_source=chatgpt.com tag or a referrer, so those visits land in GA4's Direct channel.
Adobe's Cedric Huesler found ChatGPT visits to ~500 pages fell ~31,000 a day while Direct rose ~26,000 a day, and the new Direct visitors behaved like ChatGPT visitors.
Supporting measurements:
- Profound: share of cited answers carrying a tagged link fell from ~98% on Oct 8 to 66% by Oct 14, as its Intelligent UI format jumped from 2% to ~35% of answers.
- Peec AI's Tomek Rudzki: ChatGPT placed a direct URL in 42% of responses versus 8-10% before, with 54% pointing to homepages.
OpenAI confirmed the bug to Huesler on Oct 14 and a fix began rolling out Oct 15. Annotate Oct 8-15 in reporting and count the UTM tag rather than referrers.

Google reworks links and carousels in AI Mode and AI Overviews
Sources: Search Engine Journal · Search Engine Roundtable · Google Search Product News

Google announced 5 changes to links in AI Mode and AI Overviews:
- More inline links, placed higher in responses more often.
- A new top section surfacing 1-2 official-site links for narrow tasks, with context on why each is useful.
- Timely-article carousels expanding to more locations and languages.
- Related-article links at the end of responses getting image thumbnails and a more clickable design.
Google began testing clickable creator and publisher names on AI Mode video results that link to Search profiles, which are Google-hosted pages reached first rather than the source site.
Google said Preferred Sources usage has grown more than 7x since the start of the year, but gave no user count or methodology.
Because Search Console assigns every link in an AI Overview the overview's single position, moving an inline link higher does not change its reported position.
Barry Schwartz noted Google still withholds click data in its AI performance reports, with Google saying only that it will add metrics over time.

More than 400 publications worldwide now participate in Google's News AI pilot, which pays publishers for the delivery and use of enhanced content in AI features.
New partners include Axios, CNN, The Financial Times, and Forbes, plus local outlets such as Post and Courier, Texas Tribune, Oil City News, and Shaw Media.
The program powers features like in-depth article overviews on Google News publisher pages and customizable audio briefings, with attribution and direct links.

Google launches Universal Cart in US Search and Gemini
Sources: Search Engine Roundtable · Google Search Product News

Google launched Universal Cart in the US across Google Search and the Gemini app, powered by the Universal Commerce Protocol, ahead of the holiday season.
Shoppers can save products from multiple retailers in one cart, get price-drop and restock alerts, see auto-applied promo codes, and check out via Google Pay or transfer items to the merchant site.
The cart is built on the Shopping Graph's 60+ billion product listings and Google Wallet; launch merchants include Nike, Sephora, Target, Ulta Beauty, Walmart, Wayfair, and many Shopify merchants.

The forecast puts the ranked results page losing its default-first-response status for most US queries between 2028 and 2030, with the UK and EU a year or more behind, leaving ranked links one click away rather than deleted.
Supporting data:
- AI Overviews reached 43% of US searches by May 2026, up from 15% a year earlier (Similarweb).
- AI Mode passed 1 billion monthly users but accounted for only ~0.34% of Google searches from January-April 2026.
- AI Mode drove outbound referrals on 1.6-2.5% of queries versus 17-19% for traditional search.
The trigger is ad economics: Google flips the default when answer-layer ad yield reaches rough parity with the ranked page, which is why it has not moved yet.
3 regulatory processes (UK CMA conduct requirements, an EU investigation, and the US DOJ cross-appeal) slow and stagger the shift by market.

A gradient-boosted prediction model puts a Google algorithm update at 96.8% in the next 30 days and 90.9% over 90 days (from Oct 13), with late October-mid November 2026 the prime window.
No broad core update has run since May 2026 (August and September were targeted spam updates), and Google typically runs 3-4 core updates a year.
Google's helpful-content guidance now names 4 things quality raters assess: effort, originality, talent or skill, and accuracy.
Mass-produced AI content without oversight and fake authors (AI-generated headshots, made-up names, false credentials) are cited as low-quality signals, and Gary Illyes said scaled content is becoming a bigger problem than link spam.

Published on October 16, 2026