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 user identifiers including IP addresses, cookie IDs, and hashed emails with major ad platforms like Facebook and Google, who can combine this 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 ad partners or other third parties share information with us about you, we rely on the consent they have already obtained. For example, if you visit websites that sell electric guitars, we may suggest guitar Pins to you."

Pinterest tracks user behavior across external websites (via the Pinterest Tag and partner data) and combines it with on-platform activity to build interest profiles and serve targeted content and ads.

"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, extracts geolocation from photo metadata, and also offers precise GPS tracking as an opt-in feature.

"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."

Pinterest collects extensive device information including unique device identifiers and network provider details, and continues processing synced contact information indefinitely once permission was initially 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 modify its privacy policy at any time, with continued use treated as acceptance. Even for significant changes, more prominent notice 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 certain user information even after account deletion for legal and regulatory reasons, with no clear upper bound on that post-deletion retention.