Google does not use the content of your emails to target ads: https://support.google.com/mail/answer/6603 https://support.google.com/mail/answer/6603 Ads where

Google does not use the content of your emails to target ads: https://support.google.com/mail/answer/6603 https://support.google.com/mail/answer/6603 Ads where? Do you just mean display ads on the web? If so, your browser likely ended up on a list for diaper ads by some other means. Top of mind: - Did ever add a baby-related product to a shopping cart on a retail site? - Did you visit baby-related websites? Less likely, but possible,if your browser cookie was linked to other personal information by 3rd party data brokers: - Do you use a loyalty card at a physical store? Did you suddenly buy baby stuff for the first time? - Did you return a product registration card for a carseat or something like that? The company my resell their customer lists.