Cookies can remain on your computer or mobile device for different periods of time. Some cookies are "session cookies", meaning that they exist only while your browser is open and are deleted automatically once you close your browser.
Other cookies are "persistent cookies", meaning that they survive after your browser is closed. Most persistent cookies are set to automatically expire after a defined duration (for example, a few days, weeks or months). When you return to that website (or visit other websites that use the same cookies) the website provider or its service providers can recognize the persistent cookies they have set and recognize your browsing device.