"These ads are shown to you based on your online activity while you're signed into Google. We will not scan or read your Gmail messages to show you ads." https

"These ads are shown to you based on your online activity while you're signed into Google. We will not scan or read your Gmail messages to show you ads." https://support.google.com/mail/answer/6603 https://support.google.com/mail/answer/6603 I think they used to ad-scan free Gmail accounts, but stopped several years ago because telling paying customers "well see, we do scan some email, but not yours" required too much nuance.