The numbers behind
LLM advertising
26 sources. 5 strategic themes. One conclusion: the shift to AI search is structural, irreversible, and happening now.
Five numbers that define the opportunity
Key findings
LLMs now capture 13% of global digital queries — and growing weekly, as 800M weekly ChatGPT users increasingly bypass Google.
58% of Google searches end with zero clicks. AI Overviews have crashed organic CTR by 61%, forcing brands to rethink their entire search strategy.
AI visitors convert at 4.4× the rate of organic Google traffic — making LLM placements the highest-ROI channel in digital advertising.
OpenAI generated $100M in ad revenue within 6 weeks of launch. The LLM ad market is on a trajectory from $1B (2025) to $25.9B (2029) in the US alone.
McKinsey estimates $750B in US revenue will flow through AI-powered search by 2028. Brands not present in LLM responses face traffic declines of 20–50%.
Sources
Selected from 26 validated sources across McKinsey, HBR, OpenAI, and leading industry research firms.
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LLMs Are Overtaking Search. Here's How to Adjust Your Online Presence.
Our approach to advertising and expanding access to ChatGPT
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2025 State of AI Discovery: What 1.96M LLM Sessions Reveal
AI Search Advertising: ChatGPT vs Google vs Perplexity
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