G Suite’s Gmail is already not used as input for ads personalization, and Google has decided to follow suit later this year in our free consumer Gmail service. Consumer Gmail content will not be used or scanned for any ads personalization after this change. This decision brings Gmail ads in line with how we personalize ads for other Google products. Ads shown are based on users’ settings. Users can change those settings at any time, including disabling ads personalization. G Suite will continue to be ad free.
Diane Greene writing for the Google Blog.
Glad to see Google making this change, but it’s only one step. Yes, it’s creepy to have ads targeted to you based on your private correspondence. But there’s other valuable information in your email that Google still has access to. Whatever that data is and the value it holds is what’s driving this change.