A cookie, also known as a HTTP cookie, web cookie, or browser cookie, is a piece of text stored on a user's computer by their web browser. A cookie can be used for authentication, storing site preferences, shopping cart contents, the identifier for a server-based session, or anything else that can be accomplished through storing text data. Most modern browsers allow users to decide whether to accept cookies, and the time frame to keep them, but rejecting cookies will makes some websites unusable.
Cookies are embedded in the HTML information flowing back and forth between the user's computer and the servers. Cookies were implemented to allow user-side customization of Web information. For example, cookies are used to personalize Web search engines such as Google, Bing, Yahoo and to store shopping lists of items a user has selected while browsing through a virtual shopping website, or visiting your bank to do online transactions! in this event you would not be allowed access if you reject cookies.
