What are cookies?
A cookie is a small file that is uploaded to the user’s computer when they visit a particular website. Every time you revisit the website will obtain information on the loaded cookie and the user identified.
Cookie itself does not contain information but on your computer saves a small text file that contains the lifetime of the cookie, the server name ( or domain name ) and generated unique number. About the visit to the same website to check and extract the contents of a cookie. Website recognizes the user and the information to improve the user experience.
Cookies are relevant to the operation of the website and with their help it is possible to analyze the traffic, allowing advanced advertising, on return visits are not required to log back into the website etc.