Cookies are small pieces of information sent by a website that is stored on your computer. The web client (usually a web browser) sends this data to the website in the form of an HTTP request each time it attempts to open the corresponding website. It is used to store data on the user's site.
Cookies are small files stored on your computer by a browser (for example, Internet Explorer, Firefox, Chrome or Opera) on the request of the website you are browsing. This allows the page you're viewing to remember certain information about you, such as your settings and history. It can also keep the activity of the logged-in user, so you will not have to enter your login and password during your next visits.