To give users control over their data, Gmail now displays a popup asking users to sign in or out of smart features and product personalization. The general settings disable smart compose, automatic email filtering, and other features for peace of mind while using Gmail, Meet or Chat.
Emphasis on “peace of mind”
Still, turning off product personalization and smart features can reduce the data Google collects while you use Gmail, Meet and Chat. Whether you care about privacy or just want a stripped-down Gmail experience, it might be worth opting out of these features to protect some of your data.
In the coming weeks you should see the new privacy pop-ups from Gmail. If you want to turn off product personalization and smart features today, you can do so through Gmail’s settings. (I recommend waiting for Gmail’s popups so you can disable everything at once. Figuring out all of the product personalization and smart features in Gmail’s opaque settings is both difficult and time consuming.)
Source: Google via Android Police