🔍 Read the full analysis: How Google’s AI Search Ad Expansion Could Affect Advertisers on ThorstenMeyerAI.com
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TL;DR
Google announced on Oct. 28 that ads in its AI Mode search experience are expanding to 10 additional countries, with ads also appearing in US follow-up questions. Existing Search, Shopping and Performance Max campaigns participate automatically, while Google’s reported search-ad growth slowed to 12% in the latest quarter. The effects on advertiser returns, publisher traffic and the separation of ads from AI answers remain uncertain.
Google is expanding ads in AI Mode to 10 additional countries and bringing them to follow-up questions in the United States, moving advertising further into its conversational search answers. The change matters to advertisers because existing Search, Shopping and Performance Max campaigns participate automatically, with no separate opt-out, while Google’s search-ad revenue growth slowed to 12% in the third quarter.
Google said on Oct. 28 that ads in AI Mode are rolling out in Australia, Canada, India, Kenya, Malaysia, New Zealand, Nigeria, Pakistan, the Philippines and Singapore. Brazil, Mexico and the United Kingdom are planned for the fourth quarter of 2026. In the US, ads can now appear in responses to follow-up questions, not just the initial prompt. Google describes these as “multiturn ads.”
Google’s Ads Help materials say eligible Search, Shopping and Performance Max campaigns take part automatically. Advertisers cannot separately target the AI answer placements or opt out of them, according to the source’s review of those materials. Reporting is available only in aggregate, and Google’s system can write short explanatory text alongside ads that advertisers cannot edit. Those constraints limit how directly a business can assess or control this inventory.
Google says ads in AI answers will carry a “Sponsored” label. It also says ads do not influence the AI-generated answer. That is a company statement, not an independently verified finding. Google cited internal US data from Aug. 20 to Sept. 3, 2026, showing click-through rates for sponsored product listings in AI Mode were similar to unpaid product listings there. The comparison does not establish how often users click through from AI answers to websites.
Infographic 01 · From test to global
The answer now carries the ad, in more places.
How Google moved ads into its AI answers in two years, where they show today, and the revenue pressure behind the move.
Where ads appear inside AI answers
Per Google’s help page and the 28 Oct post. The list “may not be exhaustive”.
Follow-up questions (“multiturn ads”): US only. Germany and the rest of the EU: not listed. Ads above or below AI Overviews can show wherever AI Overviews exist (200+ countries and territories).
Why now: Google Search & other revenue growth
Year over year, as reported by Alphabet. Bars scaled to 19%.
Q2 to Q3 2026: about +0.1%. Same months a year earlier: about +4.4% (my arithmetic). Google names exchange rates as the largest driver of the slowdown, and the “lower monetization” of AI Mode as one factor.
- 3 Oct 2024Ads inside AI Overviews go liveUS, mobile, after months of testing
- 21 May 2025Desktop in the US; first tests in AI ModeEnglish-speaking countries announced for later in 2025
- 20 May 2026New formats in testingConversational Discovery ads and Highlighted Answers, both with a Gemini-written “AI explainer”
- 28 Oct 2026AI Mode ads in 10 more countriesPlus “multiturn ads” in follow-up questions in the US; labeled “Sponsored”
- Q4 2026Planned: Brazil, Mexico, United Kingdom“Additional locales, including” these three
Sources: Google, 28 Oct 2026; Google Ads Help, accessed 29 Oct 2026; Google, 3 Oct 2024; Google, 21 May 2025; Google, 20 May 2026; Alphabet Q3 2026 release and the Q4 2025, Q1 2026 and Q2 2026 releases. “3× longer” is Google’s AI Mode report (US, May 2026). Quarter-on-quarter changes and bar scaling: Thorsten Meyer.
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Advertisers Face Limited Placement Controls
The expansion gives Google more chances to show ads during searches that unfold as conversations. For advertisers, the possible benefit is reaching people while they ask detailed questions and refine what they want. Google says AI Mode queries are, on average, three times longer than conventional searches, which it argues can provide more information about user intent. That figure is Google’s claim; it does not by itself show that ads generate more sales or better returns.
The practical issue is that campaign participation is automatic and reporting is aggregated. Advertisers may therefore have less ability to isolate performance in AI answers than in a separately managed placement. The unanswered business question is whether the new inventory produces useful conversions at a cost that advertisers accept. Google’s comparison of ad and unpaid product-listing click-through rates does not answer that question, because it is limited to product listings within AI Mode and does not measure website traffic or sales.
Publishers also have a stake in the shift: if AI answers satisfy searches without sending readers to websites, referral traffic could fall even if ads remain visible within Google. A 2026 working paper by Agarwal and Sen, based on a randomized experiment with 1,065 US users, reported that AI Overviews reduced clicks to websites by 39.8% when they appeared, while ad clicks showed no measurable change. The finding is from a working paper, not a peer-reviewed publication, and concerns AI Overviews rather than the newly expanded AI Mode placements. It offers a signal, not a definitive forecast for publisher traffic.
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From AI Overviews to Follow-Up Ads
Google has been adding advertising to AI-powered search in stages. Ads in AI Overviews—summaries shown within conventional search results—went live for US mobile users in October 2024 and came to desktop in May 2025. Google began testing ads in AI Mode in 2025. AI Mode is a separate, chat-like search experience where users can ask longer questions and continue with follow-ups.
At Google Marketing Live in May 2026, the company began testing formats it called “Conversational Discovery ads” and “Highlighted Answers.” The Oct. 28 announcement is a further rollout: more countries for AI Mode ads and US placements in later turns of a conversation. Alphabet’s quarterly results provide a financial backdrop. Google Search & other revenue reached $63.4 billion in July–September, up 12% from a year earlier, after growth of 17% in the previous quarter. Alphabet executives cited currency movements and other factors, as well as lower monetization of fast-growing AI Mode searches.
“Ads will be clearly labeled as ‘Sponsored’.”
— Shashi Thakur, who leads Google’s search ads, in the Oct. 28 announcement
Returns and Traffic Effects Remain Unknown
Google has not provided, in the cited announcement, a separate performance breakdown for the new country rollouts or the US follow-up placements. It is not yet clear how much advertisers will spend through these placements, whether they will produce more conversions, or how costs and returns compare with conventional search ads. Aggregate reporting may make those questions difficult for individual advertisers to answer.
Google says ads do not affect the AI’s answer, but the source material reports no independent audit of that claim. It is also not clear how the expansion will affect organic website visits over time. The working-paper experiment measures AI Overviews, not the newly announced AI Mode changes, and its results should not be treated as a direct estimate of this rollout’s impact.
As of Oct. 29, Google’s help page listed 12 countries for ads within AI answers, with English specified; Germany and other EU markets were not listed. The timing and availability of European placements remain unconfirmed by the material provided.
Watch the Fourth-Quarter Rollout
Google has said it plans to bring AI Mode ads to Brazil, Mexico and the United Kingdom in the fourth quarter of 2026. The announced rollout and the availability of ads in US follow-up questions will give advertisers more time to observe placements, although the company’s aggregate reporting may limit campaign-level comparisons.
The next useful evidence will include Google’s country-by-country availability updates, any more detailed reporting options for advertisers, and later financial results showing how AI Mode monetization develops. Advertisers and publishers will also need data that distinguishes clicks on ads from visits to websites and, where available, resulting sales. Until those measures are reported, the scale of the commercial and traffic effects remains unsettled.
Key Questions
Where is Google expanding ads in AI Mode?
Google announced expansion to Australia, Canada, India, Kenya, Malaysia, New Zealand, Nigeria, Pakistan, the Philippines and Singapore. It said Brazil, Mexico and the United Kingdom are planned for the fourth quarter of 2026.
Can advertisers opt out of AI Mode ads?
According to Google Ads Help materials cited in the source, eligible Search, Shopping and Performance Max campaigns participate automatically. The materials do not describe a separate opt-out or targeting control for these placements.
How will users identify ads in AI answers?
Google says ads in AI answers will be marked “Sponsored.” The company also says ads do not influence the AI’s answer, but the source material reports no independent audit of that claim.
Does the rollout mean advertisers will get more clicks?
That has not been established. Google reported similar click-through rates for sponsored and unpaid product listings within AI Mode in internal US data from Aug. 20 to Sept. 3, 2026. That comparison does not show whether ads generate more website visits, conversions or sales.
Are AI Mode ads available in Germany or the wider EU?
As of Oct. 29, 2026, the Google help page cited in the source listed 12 countries for ads in AI answers and specified English. Germany and other EU markets were not listed; availability and timing there remain unclear.
Source: ThorstenMeyerAI.com
