What happened
Google's Search Central team confirmed the dynamic expansion behavior on August 27 and 28, and search-status trackers picked it up the same week. The change lets an AI Overview automatically render a longer, more detailed response for queries Google's systems flag as answer-heavy. Previously, users had to click Show More to see extended reasoning, product comparisons, or step-by-step guidance. Google also confirmed that France will get AI Overviews and AI Mode by September 23, closing the last major holdout market. There was no core algorithm update in September; the ranking events for the month are the August 18-21 spam update and this AI Overview behavior change, which is arguably more consequential than either. Keywords Everywhere's AI Overviews tracker shows the expanded answers appear disproportionately on comparison, definition, and how-to queries — exactly the query set B2B buyers use during vendor research.
Why Google AI Overviews dynamic expansion matters now
MagnetizeX builds founder visibility systems for B2B firms.
The whole zero-click debate has been about a single tradeoff: the user sees an answer, so they do not click. Dynamic expansion removes the last friction point that was still nudging a small share of users toward the blue links. If your comparison page ranked position 3 and won a fraction of clicks because the AI Overview stopped at two sentences, that ceiling is now lower. The queries most affected — comparisons, definitions, and how-to — are the ones B2B founders and marketers optimize for. Traffic-to-signup ratios that felt stable in Q2 will look softer by end of September, and the culprit is a UI change, not your content quality.
- Audit which of your ranking pages sit under an expanded AI Overview this week
Use the Keywords Everywhere AI Overviews tracker or Ahrefs' AI Overview report to flag your top 20 organic pages. Any page whose target query now triggers dynamic expansion should be treated as a citation target, not a click target. Rewrite the meta description as a standalone answer that pulls the user past the overview.
- Rebuild your comparison and definition content for AI citation, not clicks
Structure pages so the first 60 words carry a self-contained answer with a named entity, a number, and a date. Google's dynamic expansion pulls from pages that answer completely in the top of the page. Long preambles now cost you visibility inside the overview itself, which is the only place you still have to be visible.
- Move the conversion CTA above the answer, not below it
Users who do click through after reading an expanded overview arrive further down the funnel. Put the demo, waitlist, or download in the hero, not the mid-scroll. Founders who tested this in Q2 saw signup rate lift 12 to 18 percent on high-intent pages after moving primary CTAs above the fold.
By the numbers: Google's Search Status Dashboard confirms no September core update, so any organic traffic drop this month traces primarily to the August 18-21 spam update or the August 27 AI Overview behavior change. France launches AI Mode on September 23, adding a market of 68 million searchers to the zero-click funnel.
What to do this week
Open Google Search Console, filter to the last 14 days, and export queries where impressions are steady but clicks dropped more than 15 percent. Cross-reference against the Keywords Everywhere AI Overviews tracker. Rewrite the top three affected pages so the first 60 words are a self-contained, citable answer with a named entity and a number. Aim to be the source the AI Overview quotes — that is the only click-adjacent slot left on those SERPs.