Persistent Cookie

Persistent Cookies:
 * Instead of expiring when the web browser is closed as session cookies do, a persistent cookie expires at a specific date or after a specific length of time. This means that, for the cookie's entire lifespan (which can be as long or as short as its creators want), its information will be transmitted to the server every time the user visits the website that it belongs to, or every time the user views a resource belonging to that website from another website (such as an advertisement).
 * For this reason, persistent cookies are sometimes referred to as tracking cookies because they can be sued by advertisers to record information a bout a user's web browsing habits over an extended period of time. However, they are also used for "legitimate" reasons (such as keeping users logged into their accounts on websites, to avoid re-entering login credentials at every visit).


 * These cookies are however reset if the expiration time is reached or the user manually deletes the cookie.