Pinterest

"We disclose information such as cookie IDs, your IP address, or a hashed version of your email address to third parties, such as Facebook Ads, Google Marketing Platform, and others who may combine that information with other information they already have about you and deliver ads about Pinterest to you. We may also provide partners with information about you so that advertisers can show you ads on or off of Pinterest."

Pinterest shares identifying information including IP addresses and hashed emails with major ad platforms like Facebook and Google, who combine it with their own data profiles on users.

"We customize the ads we show you by identifying your interests based on your onsite and offsite activities, as well as by using information we receive from ad partners or other third parties. Where we use cookies to identify your offsite interests, we'll get your consent where required. For example, if you visit websites that sell electric guitars, we may suggest guitar Pins to you."

Pinterest tracks user behavior across other websites and apps via cookies and the Pinterest Tag, building interest profiles from offsite activity to target ads and content recommendations.

"We use your IP address to infer your approximate location, even if you don't choose to share your precise location, and photos you share may include information about the location where they were taken. Depending on where you live, you can choose to share your precise location using your device settings."

Pinterest infers user location from IP addresses regardless of user preference, and also extracts location metadata from uploaded photos. Precise GPS location is also collected if device settings allow.

"Device information: We collect information about the device you use to access our Services, including the type of device, operating system, network service provider, settings, and unique device identifiers. If you previously chose to sync your contacts with your account, we will continue to process certain information about your contacts who are Pinterest users to help you find one another on our Services."

Pinterest collects extensive device identifiers and settings data, and continues processing synced contact information indefinitely after initial permission was granted.

"We may change this policy from time to time and if we do, we'll post any changes on this page. If you continue to use Pinterest after those changes are in effect, the new policy applies to you. If the changes are significant, we may provide a more prominent notice, such as by sending you an email."

Pinterest can change its privacy policy at any time, and continued use constitutes acceptance. Enhanced notice for significant changes is discretionary ('may provide'), not guaranteed.

"We generally keep log data for a period of 25 months to provide our Services to you, to make Pinterest safe, improve our product features, and to deliver ads that are relevant, interesting and personal to you. In certain cases, we also keep your information for legal and regulatory reasons, including after your Pinterest account has been deleted."

Pinterest retains log data for over two years and explicitly states it keeps data even after account deletion for legal and regulatory reasons, with no clear upper bound on that post-deletion retention.