Website owners can: https://support.google.com/admanager/answer/2913553#ad-content-targeting https://support.google.com/admanager/answer/2913553#ad-conte... Th

Website owners can: https://support.google.com/admanager/answer/2913553#ad-content-targeting https://support.google.com/admanager/answer/2913553#ad-conte... They don't because it limits revenue It doesn't disable tracking by Google or advertisers, e.g. them noting that they saw user X on a hiking website and increasing the chance to display ads to them for hiking gear elsewhere on the internet