How much of search is AI now? (an honest answer)

'How much of search is AI now' feels like it should have a clean percentage answer. It doesn't - and understanding why matters. Different sources measure completely different things: how often AI Overviews appear on results pages, how many people use AI tools like ChatGPT for questions, what share of queries end without a click, how much traffic AI referrals drive. These aren't the same metric, so they produce very different numbers. There's no single agreed measure of 'AI's share of search'.

Be skeptical of any confident precise percentage. Beyond the measurement-definition problem, the numbers change fast (platforms are rolling out AI answers rapidly), vary by query type, region, and industry, and are often cited without a clear methodology. A specific-sounding stat ('X% of searches are now AI') usually hides which of the above it's measuring - if it's measuring anything rigorous at all. Treat precise claims here as marketing, not data.

What you can rely on is the trend, not a figure. AI-mediated answers - whether via AI Overviews, standalone AI tools, or answer engines - are a significant and growing share of how people get information, and that share is rising across the board. That directional truth is well-supported and consistent even when the exact numbers aren't. It's also all you actually need to make the decision.

You don't need a precise percentage to act. The directional reality - AI answers are significant, growing, and increasingly mediate discovery - is enough to justify investing in being cited by them. Waiting for a 'reliable number' is a mistake, because a rigorous single number may never exist and the trend is already clear. Act on the direction: build citable content now, and measure your own share of voice (which you can measure reliably) rather than chasing an industry-wide statistic that can't be pinned down.