What is Http Cookie

A message given to a Web browser by a Web server, and the text string is sent back to the server each time the browser accesses a page from the server.

Due to security reasons, websites visited by an Internet user are not allowed to access the internal storage of the visitor’s computer, such as the hard disk. The only way to store a small amount of data such as visitor’s preferences, which is individual to each visitor is to store it within the browser’s storage, as plain text. Such storage is called a cookie, which was in earlier browsers a text-based file on the visitor’s computer. But now each browser decide how it stores. Though a browser may have many hundreds of cookies, each saved by a different website, each website can only access the cookie that it has placed, but not the cookies placed by another website.