Search ad revenue hit 114.2 billion as AI formats gain ground

Search is still the biggest single bet in digital advertising, but the money is no longer flowing into it as fast as it used to. U.S. search ad revenue reached $114.2 billion in 2025, enough to account for 38.8% of total digital ad revenue, yet growth slowed to 11% from 15.9% a year earlier. That is the number agencies need to sit with: search is not disappearing, but the market is clearly widening around it.

The larger digital market kept setting records anyway. Total U.S. internet advertising revenue hit $294.6 billion in 2025, a new high in the 30-year history of the IAB/PwC Internet Advertising Revenue Report, first issued in 1996. The year did not get the kind of cyclical lift that comes from the Olympics, a FIFA World Cup or U.S. elections, which makes the total even more telling. Digital video rose 25.4% to $78 billion, social advertising climbed 32.6% to $117.7 billion, and programmatic advertising increased 20.5% to $162.4 billion. The growth dollars are clearly moving faster in other directions.

That is why the old “SEO is dead” line misses the point. Search is still a massive commercial channel, but agencies can no longer treat it like a static category that grows on autopilot. The real opportunity is in channel mix: knowing when a client should lean harder into organic, when paid search should carry the load, and when a blended strategy is the only sane answer. As AI changes discovery surfaces and pushes more consumers into conversational and assisted interfaces, the agencies that win will be the ones that can explain how search, first-party data, conversion design and attribution fit together instead of selling search as a standalone silo.

The planning horizon is changing too. IAB’s 2026 outlook study, based on insights from more than 200 brands and agency buyers, pointed to performance-led strategies and accelerating adoption of agentic AI. That lines up with the 2025 revenue mix: search is still core, but it is no longer enough to defend legacy tactics or chase incremental impressions alone. The agencies that grow fastest will be the ones that can prove where search still prints money, where AI-native placements deserve budget, and how to move spend across the whole discovery funnel without losing discipline on return.