Meta Posts 26% Q3 Revenue Growth on AI-Driven Ad Stack

Meta posted family-of-apps revenue of $64.2 billion in Q3, up 26% year-over-year, with advertising contributing $63.1 billion and ad impressions up 10%, the company said on its Wednesday earnings call. The growth lands in a year in which the company is contesting an $18 billion multi-state settlement over alleged harms to children and a $25 billion New Mexico data-privacy penalty, the latter ordered hours before the call. Meta is appealing the New Mexico ruling.

What did the quarter actually deliver?

The headline figure is advertising. CFO Susan Li told investors that $63.1 billion of the $64.2 billion in family-of-apps revenue came from ads, with impression volume up 10% year-over-year. Supply growth, rather than price growth, has defined Meta's ad business across the past several quarters.

The legal backdrop is the harder story. The $18 billion multi-state settlement, tied to claims that Meta's products harm minors, was disclosed earlier in the year. The New Mexico order — $25 billion in penalties over alleged misleading data privacy practices — was issued hours before the call. Meta is appealing the New Mexico decision.

The combined $43 billion in exposure is large enough to surface in any risk-averse brand's media plan review. The ad business is growing fast enough to absorb the legal overhang, for now.

What is Muse doing for the business?

Meta launched the Muse personal AI assistant in early September, then followed with Muse for Small Business weeks later. Li described that product as "a new set of new skills and connectors" inside the Muse app that helps businesses find customers, analyze ad performance, optimize ads and draft campaigns.

On the consumer side, CEO Mark Zuckerberg called the Muse launch "one of our most successful launches ever." The number behind that claim: more than 10 million people in the United States and Canada have set up a personal agent since launch, and about 25% of them use it on any given day.

The cost line is the caveat. Muse agents are "very compute intensive to run," Zuckerberg said. Meta expects compute cost efficiency on the assistant to improve tenfold over the next year, "which will enable it to be profitable once the revenue lines are at scale," he added. The qualifier matters: Muse is not profitable today, and "at scale" carries no date.

Privacy advocates raised concerns about early Muse versions. The launch numbers suggest those concerns have not, so far, cost Meta users.

Where is the AI-driven ad lift actually coming from?

The 26% revenue jump cannot be attributed to Muse, which has been live for only weeks. The lift comes from AI tools Meta has been embedding in its ad stack for years.

Two named systems drove measurable conversion gains this quarter:

• Generative Recommender, an LLM-powered tool that analyzes ad content and user preferences to pick the best ad for each person, delivered a nearly 2% conversion lift on targeted audience segments on Facebook feeds since launch, Li said.
• GEM, Meta's generative ad recommendation model, was expanded this quarter to unify recommendation data across platforms. Offsite campaign conversions rose 1.7%; in-app conversions rose 9.6%.

Li framed both tools as components of a wider build. "AI investments have been benefitting Meta's ads business for years," she told investors. "As LLMs become the foundation of more AI infrastructure, we will have more insight into people's preferences, what they're interested in, both across organic content and recommendations."

The destination, per Meta's own framing, is Advantage+ — the automated ad optimization engine — and the company's creative personalization features. The buy-side read: the personalization stack Meta sells is now powered almost entirely by its own models, and that stack is the one Advantage+ sits on top of.

The Q3 numbers show an advertising business still compounding and a personal AI product scaling faster than it pays for itself. The next year, by Meta's own projection, is the period in which that gap either closes or becomes harder to defend on the call.