Gmail was never used to serve ads outside of gmail. The use of email to serve ads was stopped in 2017. https://www.nytimes.com/2017/06/23/technology/gmail-ad

Gmail was never used to serve ads outside of gmail. The use of email to serve ads was stopped in 2017. https://www.nytimes.com/2017/06/23/technology/gmail-ads.html https://www.nytimes.com/2017/06/23/technology/gmail-ads.html