Strictly necessary
Required for the site to work — your shopping cart, staying signed in, and security checks. These cannot be turned off.
atp_session_id, PHPSESSID, csrf
Functional
Remembers your preferences, such as saved favourites and recently viewed parts.
wishlist, recently viewed
Analytics
Helps us see which pages and products people use, so we can improve the site.
sp_visitor
Marketing
Records which search engine, ad or link brought you here, so we know which campaigns are worth running.
sp_attribution