Google Analytics is a part of the Google Marketing Platform, which allows website administrators to track and analyze website traffic. Google shares data from its Google Analytics silos with its Google Advertising Divisions. For example, data pools from first-party cookies set by Google Analytics can be shared with Google Ads infrastructure.
Do you ever read The New York Times, The Atlantic, or Gizmodo online? Do you look up medical information on the Mayo Clinic’s website, or shop on Home Depot’s e-commerce site? Have you ever had to utilize the US Federal Trade Commission’s IdentityTheft.gov portal? If the answer to any of these is “yes”, then it is likely Google knows where you were physically sitting when you browsed these websites.
Link: 86% of websites using Google Analytics are not anonymizing their users’ full IP addresses