Google stops scanning Gmail emails for ad targeting

Google will cease scanning Gmail bodies and subjects for ad targeting later this year, meaning ads will rely on broader account signals rather than inbox content—a move that could reshape how advertisers reach the 1.2 billion Gmail users [1].

How the shift works

Google’s new policy removes the practice of parsing the last few hundred non‑spam emails—including deleted and archived messages—to match advertisers’ keywords and topics. Instead, ad personalization will draw on the same “ad‑settings” used for Search, Search history, YouTube, and Chrome activity for users who are signed in and have ad personalization enabled [1]. The change does not affect spam filtering, virus detection, or Smart Reply, which will continue to scan email content for functional purposes [1].

Legal backdrop and AI claims

A class‑action suit filed on Nov. 11 alleges Google secretly enabled Gemini to train on private Gmail, Chat, and Meet communications without consent, citing the same smart‑features settings [2]. Google’s spokesperson called the reports “misleading,” stating that Gmail content is not used to train Gemini and that any existing smart‑features have operated for years without such training [2]. Malwarebytes later clarified that while Gmail content is scanned for spam and smart‑reply, it is not harvested for AI model training [2].

Market implications

Analysts note that Google already possesses extensive user data from search, YouTube, and Chrome, reducing the marginal value of inbox‑level signals [1]. Consequently, advertisers are unlikely to see a material impact on campaign performance, as audience modeling has become “much more powerful” than keyword‑in‑email targeting [1]. Competitors that rely on email‑content data for ad targeting may find the shift less disruptive, given the industry trend toward broader behavioral profiling.

What to watch

• Rollout timeline: Confirmation of the exact date when email‑content ad scanning will be disabled, expected later in 2025.
• Regulatory response: Any court rulings or settlements from the class‑action lawsuit that could force changes to smart‑features settings.
• Advertiser adaptation: Shifts in Google’s ad‑product pricing or targeting options as advertisers adjust to the new data sources.

The move underscores Google’s confidence that its broader behavioral data outweighs the incremental insight from inbox content, while the pending lawsuit keeps the question of AI training on private communications open.