Purposes of the storage of, or access to, cookies
Cookies make the interaction between users and websites faster and easier. Without cookies, it would be very difficult for a website to allow a visitor to fill up a shopping cart or to remember the user’s preferences or registration details for a future visit.
Cookies enable websites to monitor their users’ web surfing habits and profile them for marketing purposes (for example, to find out which products or services they are interested in and send them targeted advertisements). [source: AboutCookies.org ]