Google AI search ads expand as revenue growth cools

Google AI search ads are expanding into more markets and conversational moments, while the company's search advertising growth has slowed. More search activity and more advertising revenue are different signals, and neither directly tells an advertiser whether its own acquisition performance has improved.

What changed in Google's advertising results?

As of October 29, 2026, Marketing Dive reports that search advertising revenue increased 12% year over year in the third quarter of 2026, while YouTube advertising revenue increased 9%. Both services had recorded 15% growth in the comparable quarter a year earlier. The report puts total Google advertising growth at 10.6% and quarterly search revenue at $63.4 billion for the period ending September 30.

At the same time, Google executives said search query growth reached its fastest pace in five years. The report describes several influences on the revenue result: lower monetization in AI Mode, foreign exchange pressure, weakness in some categories in Asia-Pacific and spending normalization after a World Cup-driven second quarter. The information does not establish AI search as the sole cause of the slower growth.

Where are AI Mode advertising opportunities developing?

The report says Google is taking AI Mode ads into international markets and introducing a multiturn format in the United States that can appear during follow-up queries. A longer exchange can expose more of the criteria a shopper is weighing, creating a different context from a single short query.

• Query growth describes activity on the search service.
• Advertising revenue growth describes Google's business result.
• Cost per acquisition and order quality describe an advertiser's outcome.

These measures can move differently. International expansion also does not establish that a given format is available in every Korean advertiser's account. Teams should verify supported markets and the options actually presented in their own account before planning an activation.

Takeaways for marketers

Start with the customer's decision rather than a platform earnings headline. Someone comparing product conditions may need a different landing page from someone searching for a specific product name. Useful answers about suitability, price and purchasing conditions can support that comparison, but a poorly connected buying journey can waste the opportunity created by a new placement.

Build a reporting view that relates search intent to meaningful outcomes. Where the available account reporting supports it, examine conversions, new customers and completed orders alongside traffic. First establish which AI-related placements can actually be identified in the data. Do not create an artificial split between AI Mode and conventional search when the reporting cannot support one.

This is our operational interpretation of the news, not a claim that these steps produce a specified performance lift. A sensible test keeps the business objective consistent and checks whether additional traffic brings useful demand. An increase in conversations may create opportunities earlier in the decision process, while still requiring further evidence before a budget increase is justified.

To connect search activity with clearer landing pages and business measurement, explore our Marketing services.

Source: Marketing Dive on Google's AI search changes and advertising results, as of October 29, 2026.