We use both session cookie, ie they are deleted when you close your browser, and “ordinary” cookies are stored for a long time. They are used to save items in shopping cart / checkout while you are on the page. Cookie are also used to remember if you are logged on, the settings you have chosen, which cart is yours, statistics, advertising and marketing.
Do not you want to accept cookie your browser can be set so that you automatically deny the storage or are informed every time a website asks to store a cookie. The browser can also delete previously stored cookie. You can also delete cookie manually from your hard drive at any time. If you choose not to accept cookie, some functions can still be used, but you can limit the functionality of the page.