Google expands AI Search ads globally as core ad growth slows

On Alphabet's third-quarter earnings call, Google said it is expanding ads in AI Mode into international markets and rolling out multi-turn ads in AI Mode in the US. It's the first time Google has taken its AI search monetization global.

The backdrop matters. Alphabet posted $127.6 billion in revenue, up 25%, but Search revenue growth slowed to 12% from 17% the prior quarter and 19% the quarter before. Shares fell 8% after the results. The AI answer box is no longer just a product experiment; it's being asked to carry the ad business.

Our read: this was always where AI search was headed, and today Google said so out loud to investors. The company that taught the internet to pay for blue links now needs advertisers to pay for placement inside a conversation. That's a bigger shift than it sounds, because a sponsored answer sits much closer to advice than a sponsored link ever did.

Google's case is that it's working. Its chief business officer said click-through rates for sponsored product listings in AI Mode are comparable to organic listings, and the company says its user research finds the ads relevant. Usage numbers support the bet: Sundar Pichai said queries grew at their fastest rate in five years, AI Mode queries run three times longer than traditional searches, and one in five AI Mode searches involves voice, images, or documents. Longer, richer questions are more valuable to advertisers. That's the commercial logic.

Here's what we're wary of. When an assistant answers a multi-turn question about what to buy, the line between recommendation and advertisement gets thin. Click-through parity with organic results could mean the ads are genuinely useful. It could also mean users can't easily tell them apart. Google's numbers don't settle which. Labeling, and whether people can see what's paid in a conversational flow, is the whole ballgame here.

And there's the pressure angle. Slowing search growth plus an 8% stock drop is exactly the environment in which ad load creeps up. We'd give useful AI search the benefit of the doubt; we'd watch closely whether the answers stay answers as the revenue targets climb.

In May, Google introduced Gemini-powered ad formats including conversational discovery ads that respond to users' questions and sponsored recommendations woven into AI-generated answers. The global expansion builds directly on that.

Elsewhere in the quarter, Google Services generated $96.3 billion, up 11%, while Google Cloud revenue rose 103% to $30.7 billion.