Instead of expiring when the web browser is closed as session cookies do, persistent cookies expire at a specific date or after a specific length of time. Unlike other cookies, session cookies do not have an expiration date assigned to them, which is how the browser knows to treat them as session cookies.
Web browsers normally delete session cookies when the user closes the browser. This can also be done to some extent by using the IP address of the computer requesting the page or the referrer field of the HTTP request header, but cookies allow for greater precision.Ī cookie will typically contain the name of the domain from which the cookie has come, the “lifetime” of the cookie, and a value, usually a randomly generated unique number.īrowsers, nowadays, use different types of cookies such as:Ī session cookie, also known as an in-memory cookie, exists only in temporary memory while the user navigates the website. Some cookies (tracking cookies) are used to track users’ web browsing habits. For example, a web server might send a cookie containing the username last used to log into a website so that it may be filled in automatically the next time the user logs in. Cookies are designed to be a reliable mechanism for websites to remember useful information (such as items in a shopping cart) or to record the user’s browsing activity (including clicking particular buttons, logging in, or recording which pages were visited by the user as far back as months or even years ago).Ĭookies are used for a number of purposes – some types of cookies perform essential authentication function as they help web servers recognize whether the user is logged in or not, and which account they are logged in with.Ĭookies can be used to remember information about the user in order to show relevant content to that user over time. Every time a user loads a website, the browser sends the cookie back to the server to notify the website of the user’s previous activity. Due to their key role of enhancing/enabling usability or site processes, disabling cookies may prevent users from using certain websites. They are used by web developers to help users navigate their websites efficiently and perform certain functions. Cookies, also known as browser cookies or tracking cookies, are small, often encrypted text files, located in browser directories.
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