Marketing cookies are used to track visitors across websites. 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.</p> Name Provider Purpose Expiry Type _an_uid siteimprove.com Presents the user with relevant content and advertisement. The service is provided by third-party advertisement hubs, which facilitate real-time bidding for advertisers. 6 days HTTP Cookie _fbp siteimprove.com Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers. 3 months HTTP Cookie _gcl_au siteimprove.com Used by Google AdSense for experimenting with advertisement efficiency across websites using their services. 3 months HTTP Cookie _gd_session siteimprove.com Collects visitor data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads. 1 day HTTP Cookie _gd_svisitor siteimprove.com Collects visitor data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads. 2 years HTTP Cookie _gd_visitor siteimprove.com Collects visitor data related to the user's visits to the website, such as the number of visits, average time spent on the website and what pages have been loaded, with the purpose of displaying targeted ads.