 Do you know what cookies are? Cookies have bits of data in a text format that gets stored in a browser and is read by a web server. Websites use cookies to remember information about users, either to keep track of actions that the user perform on the website like adding items to a card, or to allow users to navigate between pages without having to log in every time. Cookies can be of two types, stateful or stateless. When a server keeps part of the information related to a cookie, that's what we call a stateful cookie. You need to make more requests to get the full picture, whereas stateless cookies will live in the browser and the server won't store information. Keep in mind that stateless cookies need to have a layer of encryption or at least be signed to prevent external tapering. It is important to note that users can't choose whether or not to accept cookies by changing the settings on their browser. Now you know what cookies are and this has been identity in a minute.