A single cookie is used to store all user information . It is coded and expiration completamiente is limited to that which is marked in the store management . This cookie is stored data relating to :
User session: if the user is registered your user ID , name and password is stored , but you have information about a generic user.
Shopping Cart: whether or not registered , if the user adds something to the shopping cart , is recorded in the cookie information associated cart.
Cookies for the service of caching are used, in order to show the appropriate cached content based on them.