Marketing cookies are used to follow visitors to websites. The intention is to show ads that are relevant and engaging to the individual user.
Common Marketing Cookies (Table)
ID (slug) Cookie Name(s) Provider Purpose Expiry Type
google-ads _gcl_au Google Ads Used by Google AdSense to experiment with advertisement efficiency across websites using their services. 3 months HTTP
facebook-pixel _fbp Meta/Facebook Used by Facebook to deliver a series of advertisement products such as real-time bidding from third-party advertisers. 3 months HTTP
linkedin-insight li_sugr, UserMatchHistory LinkedIn Used to track users and show more relevant ads on LinkedIn. 30 days – 6 months HTTP
twitter-ads personalization_id Twitter (X) Helps Twitter provide more relevant ads and track advertising campaigns. 2 years HTTP
bing-ads _uetsid, _uetvid Microsoft Bing Used to track users across multiple websites to present relevant ads. 1 day – 16 days HTTP
ga4-marketing _ga, _ga_* (when ads personalization enabled) Google Analytics / Ads Distinguishes users and enables remarketing audiences for advertising. 2 years HTTP
facebook-pixel
Meta/Facebook
Used by Facebook to deliver a series of advertisement products such as real-time bidding from third-party advertisers.
90 days
google-ads
Cookie ID/Slug: e.g. google-ads
Cookie Name(s): _gcl_au
Provider: Google Ads
Purpose: "Used by Google AdSense to experiment with advertisement efficiency across websites using their services."
Expiry: 3 months
Type: HTTP
3 months
