🔍 Read the full analysis: The Growing Role Of Ads In Google’s AI Search Experience on ThorstenMeyerAI.com
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TL;DR
Google said on October 28 that ads in its AI Mode search experience are expanding to 10 more countries, with ads also appearing in US follow-up questions. Alphabet reported 12% year-over-year growth in Search & other revenue for the third quarter, down from 17% in the prior quarter; the company cited lower monetization of AI Mode searches among several factors. The expansion raises questions about ad transparency and the effects of AI answers on publisher traffic.
Google said on October 28 it is expanding ads in its conversational AI Mode search experience to 10 more countries and beginning to show ads in US follow-up questions. The move extends advertising into more parts of AI-powered search as Alphabet reported 12% year-over-year growth in its Search & other business for the third quarter, down from 17% in the previous quarter.
The expansion covers Australia, Canada, India, Kenya, Malaysia, New Zealand, Nigeria, Pakistan, the Philippines and Singapore. Google said Brazil, Mexico and the United Kingdom are planned for the fourth quarter of 2026. In the United States, the company is adding ads to follow-up queries in AI Mode, so an ad may appear after a user asks an additional question in the same search conversation.
Google’s help information says existing Search, Shopping and Performance Max campaigns can appear in these placements automatically. Advertisers do not have a separate targeting control or an opt-out for AI Mode placements, according to the source material. Reporting is provided in aggregate, and Google generates short explanatory text alongside ads that advertisers cannot edit.
Google says ads in AI answers will be labeled “Sponsored” and that advertising does not affect the AI-generated answer. The company also says AI Mode queries are, on average, three times longer than traditional searches. Its reported comparison of ad and unpaid product-listing click-through rates is based on Google’s internal US data from August 20 to September 3, 2026; it does not measure clicks through 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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Ads Follow the Search Conversation
Showing ads in follow-up questions extends commercial placements beyond the initial search. A user asking for advice, then narrowing down a product or solution, may encounter advertising within the same AI exchange. That gives Google more opportunities to connect a query with a paid listing, while making the distinction between an answer and an advertisement an immediate concern for users.
The financial backdrop is relevant but does not establish that the expansion is a response to one quarter’s results. Alphabet reported $63.4 billion in Search & other revenue for July through September, up 12% from a year earlier. Growth was 17% in the preceding quarter. On the earnings call, chief business officer Philipp Schindler cited currency effects as the largest factor and also said faster growth in AI Mode queries had an effect because those searches were being monetized at a lower rate.
For publishers, the question is whether AI summaries change how often people click through to websites even as ads remain visible. A 2026 working paper by Agarwal and Sen, based on a randomized experiment with 1,065 US users, reported that AI Overviews reduced website clicks by 39.8% when they appeared, while ad clicks showed no measurable change. That is a specific study result, not proof that the same effect applies to every search, publisher or AI Mode placement.
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From AI Overviews to AI Mode
Google’s AI search advertising has expanded in stages. Ads in AI Overviews—summaries shown within ordinary search results—went live for US mobile users in October 2024 and reached desktop in May 2025, according to the company’s published timeline. Google also began testing ads in AI Mode in 2025.
At its May 2026 marketing event, Google introduced tests of additional formats, including Conversational Discovery ads, which use Gemini to tailor ad text to a question, and “Highlighted Answers,” which can place an ad within an AI recommendation list. The October announcement concerns the geographic expansion of AI Mode ads and ads in US follow-up questions; it does not establish that every previously tested format is broadly available.
Alphabet’s third-quarter figures show year-over-year Search & other revenue growth slowing from 17% in the second quarter to 12% in the third. Schindler said exchange rates were the biggest factor. He also cited pressure on some retail advertisers in Asia and normalized media and entertainment spending after a strong World Cup quarter. His comments link lower AI Mode monetization to the results, but do not attribute the entire slowdown to AI search.
“Ads will be clearly labeled as ‘Sponsored’.”
— Shashi Thakur, who leads Google’s search ads, in the October 28 announcement
Labeling and Traffic Effects
Google’s statement that ads do not influence the AI-generated answer is a company claim; the source material identifies no independent audit of that assertion. The announcement also does not detail how the label will appear in every layout or how users will distinguish an ad from surrounding AI-generated recommendations on different devices.
The scale and effect of the rollout remain uncertain. Google has not provided, in the material cited here, a separate revenue figure for AI Mode ads, a full account of how often they will appear, or evidence that the reported ad click-through comparison translates into unchanged website traffic. The working paper on AI Overviews addresses a different search feature and should not be treated as a direct measurement of the new AI Mode placements.
As of October 29, Google’s help page lists 12 countries for ads in AI answers and specifies English-language availability. Germany and other EU countries are not listed. The planned timing for Brazil, Mexico and the UK is the fourth quarter, but exact launch dates and language availability were not provided in the source material.
Rollout and Reporting Milestones
Google’s next stated expansion is planned for Brazil, Mexico and the United Kingdom in the fourth quarter of 2026. The company has not given specific dates in the material available as of October 29. Advertisers and users will be able to see how the new placements appear as the rollout proceeds, while publishers will be watching referral traffic from search.
Further evidence will be needed to assess the effects: separate data on AI Mode ad revenue, placement frequency, user behavior and referrals to websites would help distinguish Google’s internal performance measures from the broader impact on the search ecosystem. For now, Alphabet’s earnings commentary confirms that AI Mode searches are growing and are less monetized than other search activity, while the longer-term financial and traffic effects of the ad expansion remain unsettled.
Key Questions
Where is Google expanding ads in AI Mode?
Google said ads are expanding to Australia, Canada, India, Kenya, Malaysia, New Zealand, Nigeria, Pakistan, the Philippines and Singapore. Brazil, Mexico and the UK are planned for the fourth quarter of 2026.
What is new for US users?
Google is adding ads to follow-up questions in AI Mode. That means a later question in a search conversation may carry an ad, not just the initial query.
Can advertisers opt out of AI Mode placements?
According to Google’s help information cited in the source material, existing Search, Shopping and Performance Max campaigns participate automatically, with no separate AI Mode opt-out or targeting control. Reporting is aggregated.
How does Google say ads will be identified?
Google says ads in AI answers will carry a “Sponsored” label. Its additional claim that ads do not affect AI-generated answers has not been independently audited in the source material.
Does the expansion explain the slowdown in Search revenue growth?
Not by itself. Alphabet reported 12% year-over-year growth in Search & other revenue in the third quarter, compared with 17% in the second. Philipp Schindler cited exchange rates as the largest factor and also pointed to lower monetization of growing AI Mode searches, alongside other factors.
Source: ThorstenMeyerAI.com
