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SEO & GEO Weekly

SEO & GEO Weekly · 2026-W43 · 2026/10/19

Google is feeding fake rankings to SEO tools

8% of SERPs served to trackers were fake, ChatGPT traffic "fell" on missing tags, and Google put a cart in Search.

Two of the numbers SEOs check every morning were wrong this week. Google is serving fake result pages to scrapers, so your rank tracker may show drops that never happened. ChatGPT links lost their tracking tags for a few days, so AI traffic looked like it fell. Meanwhile Google put a shopping cart inside Search, and some of the biggest sites started blocking AI agents. New this issue: the fastest-growing SEO and GEO skill packs, from our OpenSkills data.

1. Google is serving fake result pages to rank trackers

TL;DR Nozzle checked 27.5 million SERPs and found 8% came back "poisoned": a normal-looking page with most of the keyword's usual sites swapped out. It has been happening since last month.

Why it matters On a poisoned page the organic results kept 20.7% of the previous SERP's sites, against 88.5% normally. A tracked site missed the top 10 on 58.6% of poisoned pages, against 2.7% before. 77.9% of them were back to normal within three days. So a one-day drop in your tracker is more likely this than a real ranking change.

What people are saying

Do this Before you react to a drop in a rank tracker, check the same query's clicks in Search Console. If clicks are flat, wait three days and check again.

2. Your ChatGPT traffic didn't drop. Its tracking tags did

TL;DR ChatGPT-attributed traffic fell in several analytics datasets this month. Analysts traced it to ChatGPT links that opened without UTM tags. Lily Ray reported it patched by Thursday.

Why it matters Those visits were still happening, just filed as direct. AI traffic is hard enough to see without losing the one label it had. Bing Webmaster Tools now shows which topics you are cited for and how often. Google still shows no AI Mode click data, though AI conversations leave traces in Search Console.

What people are saying

Do this Annotate the ChatGPT gap in GA4 and compare referral plus direct for those days. Then verify your site in Bing Webmaster Tools and look at what it says you are cited for.

3. Google put a cart in Search. Big sites started blocking agents

TL;DR Google's Universal Cart is live in US Search and the Gemini app, built on the Universal Commerce Protocol. Around the same time, Delta, JPMorgan Chase, Charles Schwab and Yelp limited what AI agents can do on their sites.

Why it matters For stores, the cart means an agent can take a shopper from answer to checkout, so your product data becomes the storefront. Bill Hunt tested 122 Shopify stores: a store can look agent-ready by default and still fail on shipping, pickup or cancellation questions. And if sites start feeding agents bad data the way Google feeds scrapers, agents will recommend the wrong products at the wrong prices.

What people are saying

Do this Ask Gemini and ChatGPT your own shipping, returns and pickup questions as a shopper would. Fix any wrong answer on the page it came from.

4. How Gemini and ChatGPT choose what to cite

TL;DR Resoneo analysed 222,753 Google searches made in 76,450 Gemini conversations. Gemini sorts your question into categories, expands it before searching, and cites Wikipedia and news sites most. It reads YouTube but rarely cites it.

Why it matters Every answer starts with sub-queries you can find and rank for. Self-promotion still works, but it is visible: in a study of 18,084 software questions, 34% to 47% of cited listicles were written by a vendor, and only 16% said so.

What people are saying

Do this Pick 5 prompts your buyers would ask. Run each in ChatGPT, open the search trail, and write down every sub-query. Check where you rank on Google for each one.

By the numbers

From SeekWinners' US shopping-search sample: 3,072 category terms across 12 categories. This is our data.

  • 62% of shopping terms show an AI Overview, up from 60% last week. Highest: Health and Beauty at 82% and Electronics at 81%. Lowest: Furniture at 35%.
  • Reference sites take 20% of citations, against 13% for Shopify stores. Wikipedia is the #2 cited host in 10 of 12 categories, which matches what the Gemini study found (theme 4).
  • YouTube is still the top cited host in all 12, with 21% of citations. Shopify stores do best in Apparel at 19% and worst in Vehicles and Parts at 3%.

Rising skills this week

The fastest-growing SEO, GEO and writing skill packs for Claude Code and other agents, ranked by install growth over 7 days on OpenSkills. This is our data. Security audits come from skills.sh.

  1. Humanizer (blader): 9,700 installs, +8.0% this week. Rewrites AI-sounding drafts so they read like a person wrote them. Audit: warn. npx skills add blader/humanizer
  2. GEO-SEO for Claude (zubair-trabzada, 15 skills): 11,937 installs, +7.3%. GEO audits, llms.txt generation and an "is this page citable by AI" check, run with parallel subagents. Audit: pass, with warnings on some skills. npx skills add zubair-trabzada/geo-seo-claude --skill geo-audit
  3. Matt Pocock's writing skills (4 skills): 1.8 million installs, +6.2%. The biggest pack here, and still growing fast. Turns notes into an article one beat at a time, plus a guide to writing CLAUDE.md and skill files. Audit: pass. npx skills add mattpocock/skills --skill writing-shape
  4. Claude SEO (AgriciDaniel, 33 skills): 163,185 installs, +4.2%. Site-wide audits with a scored fix list. Its local SEO skill grew fastest inside the pack. Audit: pass, with warnings on some skills. npx skills add AgriciDaniel/claude-seo

How we rank: whole packs, not single skills, with at least 200 new installs in 7 days. We leave out packs whose skills all show near-identical install counts and no new stars.

Worth a click

From CiteCycle

Themes 1 and 2 are about data you can't trust right now. CiteCycle asks ChatGPT, Gemini, Claude and Google AI Overviews your buyers' questions every week, and records separately whether you were mentioned and whether your pages were cited. It doesn't depend on referral tags or a rank tracker scraping Google.

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