Google is betting on AI search even as AI-generated answers start to eat into the advertising model that made Search a giant. The Observer’s account puts the tension plainly: Google needs its next growth engine to arrive before its old one loses too much power.
Watch Desk analysis
What happened
In an article published on 5 November, The Observer reports that Search generated 56% of Google’s revenue last year, while AI Mode queries are already reducing monetisation of traditional searches. Google executive comments cited in the article say total search volume reached a five-year high, but AI Mode queries were bringing in less advertising revenue.
The article says search-ad growth slowed from 17% to 12%, and reports that Google is scaling adverts in AI Overviews and AI Mode. It also describes the cost of the transition: Google spent $51.4bn on data centres and equipment in the last quarter, more than its $40.6bn operating profit. The Observer cites Sistrix data showing AI summaries on more than 77% of a sample of one million UK searches, and says analysts estimate that first-page websites lose about half their clicks when summaries appear.
Why it matters
Google is trying to make AI the next interface for finding information without letting that interface hollow out the advertising business paying for it. More AI summaries may keep people inside Search, but fewer clicks to websites and weaker ad returns create a difficult trade-off for Google and the publishers relying on search traffic.
The stakes reach beyond one product launch. The Observer reports that Google’s cash flow was negative for a second consecutive quarter and that its infrastructure spending is absorbing vast sums. Those figures make the question less “Can Google build AI search?” and more “Can it make the new experience pay before the old economics give way?”
Our read
This is a genuine cannibalisation problem, not just an AI feature bolted onto a search box. Google’s challenge is to make AI answers useful enough to keep people searching, while preserving enough value for advertisers and publishers. That is a much trickier balancing act than adding another tab and calling it a strategy.
The Observer’s figures and expert assessments describe the pressure; they do not settle how quickly the business will change. Still, the central tension is already visible in the company’s reported results and its move to scale ads in AI search.
What to watch
- Whether ads in AI Overviews and AI Mode generate revenue comparable to traditional search.
- Whether Google’s search-ad growth stabilises as AI features expand.
- Whether publishers continue to lose clicks as AI summaries appear across more searches.
- Whether Google’s spending on AI infrastructure produces returns that can offset pressure on Search.
Discussion spark: Should Google prioritise protecting the search business that funds it, or accept cannibalising that business to make AI search the default?
Sources and evidence
- Google’s AI gamble is eating the search empire it built (5 November 2026, 14:00 UTC)
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