AI Search advertising isn't one channel, it's three very different games.
Fresh data from Similarweb shows just how differently ChatGPT, Google AI Mode, and AI Overview handle ads:
ChatGPT โ full conversation context, 1 brand per turn, 56% of ads fire later in the chat
AI Mode โ keyword match, 98.5% on Turn 1, multiple ads per response
AI Overview โ search query based, shared carousel of product cards
And the brand mix tells the story: HubSpot, Fiverr, Preply and Cursor dominate ChatGPT, while Amazon, eBay, Walmart and Temu own Google's AI surfaces.
Different targeting, different timing, different winning brands.
๐ Full report by Similarweb











