The intention is to display ads that are relevant and engaging for the individual user and thereby more valuable for publishers and third party advertisers.NameProviderPurposeExpiryType_fbp [x2]Facebook<br>facebookUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.3 monthsHTTPtrFacebookUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.