Google’s advertising requirements can be summed up by Google’s Advertising Principles. They are put in place to provide a positive experience for users. https://support.google.com/adwordspolicy/answer/1316548?hl=en
We use Google AdSense Advertising on our website.
We have implemented the following:
Remarketing with Google AdSense
We, along with third-party vendors such as Google use first-party cookies (such as the Google Analytics cookies) and third-party cookies (such as the DoubleClick cookie) or other third-party identifiers together to compile data regarding user interactions with ad impressions and other ad service functions as they relate to our website.
Users can set preferences for how Google advertises to you using the Google Ad Settings page. Alternatively, you can opt out by visiting the Network Advertising Initiative Opt Out page or by using the Google Analytics Opt Out Browser add on.