To help advertisers measure the effectiveness of their ads on Pinterest, we may share information about your activity on Pinterest with them or a measurement service they work with.
For example, an advertiser can place HTML code on their website to read the Pinterest cookie stored in your browser (this code is called a ‘pixel’ or ‘tag’). If you’re signed in to Pinterest when you make a purchase on the advertiser’s website, the tag sends that information and your cookie to Pinterest. We’ll use that info to tell the advertiser how many purchases resulted from their ads shown on Pinterest. If the advertiser also passes us a transaction number that identifies your purchase, we can tell them about the ads that led to that purchase. If you don’t want us to share information with our partners in this way, you can adjust your choices at any time by visiting your account settings.