You can opt out of showing ads that are based on users’ interests, demographics and Google Account information. In turn, Google won't use visitation information from your site to help infer interests and demographics, and won't add visitation information from your site to users' Google Accounts. However, you can't opt out of showing ads to users based on their previous interactions with the advertiser, such as visits to an advertiser's website, known as remarketing.
Bear in mind that by opting out, you might decrease the number of ads competing to appear on your site, which may decrease your potential earnings.
To opt out of showing user-based ads:
- Sign in to your AdSense account.
- Click Blocking controls
All sites
- Under 'Personalized ads', use the control
to opt out of user-based ads.
All sites 
to opt out of user-based ads.Notes:
- Ads that you've blocked by category, by advertiser URL or using the Ad review centre won't appear to users through user-based advertising.
- This opt out only applies to AdSense for content.
