Agent Beat for September 27, 2026

Welcome to Agent Beat, the daily briefing on how AI finds brands and how agents choose what to buy. Today is Sunday, September 27, 2026. Here is what happened.

Google is testing purchases from Flipkart, the Walmart-owned Indian marketplace, inside Gemini and AI Mode, TechCrunch reports. The test covers selected products and users, with a wider rollout planned for later in October. For marketers selling in India, this is a buying path that runs through Google's assistant. The October expansion is the point to watch to see whether their products are reachable there.

That test in India is about buying inside an assistant. In search results, the links inside AI Overviews are changing too. Search Engine Journal reports that Google now places more links inside AI Overviews, and that some of those links send the click into AI Mode rather than to a website. Search Console counts the two kinds of interaction differently, so an AI Overview link in a report does not always mean a visit. Marketers should check which AI Overview placements actually reach their pages before counting them as traffic.

Getting cited in those answers is the work behind generative engine optimization, or GEO. A Journal du Net column argues that no single department owns it. Technical teams, SEO staff and communications all have to work on it together if a brand is to be cited in AI answers. The piece is a first-person argument rather than new data or a product announcement. Marketers should treat GEO as a shared process across engineering, SEO and content instead of parking it with one team.

Search rankings can move when Google runs a spam update. Google announced the September 2026 spam update and said the global rollout will take a couple of weeks and affect all languages. Google says only sites that break its spam policies are affected. Marketers should watch rankings over the next two weeks for any pages they rely on for AI-answer citations, because a page that drops out of Google's index cannot be quoted by Google's AI features.

When pages disappear from search, not all of them are HTML. Google has been dropping PDFs from its index at scale, with many affected URLs showing as "Crawled, not indexed" in Search Console, Glenn Gabe writes, crediting Savanna Gray with spotting it on LinkedIn. Gabe sets out a method that uses the Search Console API, the URL Inspection API and Analytics Edge to find every PDF a site has lost. He says some sites have since seen PDFs reindexed and clicks recover. Sites that keep product sheets, specs or documentation in PDFs should check those URLs in Search Console and move the content to HTML where they can.

Publishers face a different automated problem: who sells their ad inventory. A Journal du Net adtech column looks at why not every publisher will manage to build its own seller agent, the automated system that sells ad inventory on its behalf, and sets out the options open to them. It says the market is turning toward agentic trading while the obstacles to building the capability in-house are numerous. Publishers should plan for a choice between building, buying or renting that agent rather than assuming they can build one.

That shift in ad selling sits alongside changes in search results. Google's September 2026 spam update is rolling out worldwide and may take up to two weeks to complete, Search Engine Journal reports. Spam updates change which pages survive in search results, and those results feed the sources behind AI Overviews and AI Mode. Marketers should watch Search Console for ranking losses over the rollout window on the pages they depend on for AI citations.

While rankings move, Search Console is adding a new view of how people arrive. Google Search Console now reports performance for multimodal web searches, so site owners can see how people reach their pages through searches that mix images and text, Google says. The post does not name the individual surfaces that feed the report. Marketers should open the new report and check how much of their traffic and impressions come from visual and multimodal queries.

Seeing visual traffic is one thing. B2B buyers often arrive with questions instead. Semrush published a guide to B2B answer engine optimization, arguing the work improves the odds of appearing in the AI answers that buying committees read. The post covers how B2B buyers use AI tools and how content should be written for those answers. Marketers selling to buying groups can use it as a starting checklist for the pages they want cited.

There is also a timing detail on the spam update. Google began rolling out its September 2026 spam update on September 24, its fourth spam update of the year, according to the Search Status Dashboard and a Google Search Central post. The rollout is global and covers all languages, and Google's John Mueller told Search Engine Roundtable it can take up to two weeks, longer than the earlier 2026 spam updates. Google has not said which parts of its spam detection changed. Expect ranking and organic traffic movement over the next two weeks, and check Search Console before drawing conclusions from a single day's numbers.

That is today's Agent Beat. Thank you for listening. For the full written brief, go to agent-beat.com.