A cookie, also known as an HTTP cookie, web cookie or browser cookie, are small files that some websites save or store on a user's web browser, while the user is browsing or navigating a website.
The cookies are commonly used by people of applications to differentiate users and to act in different ways depending on these, cookies invented for use in a virtual shopping cart, which acts as a virtual device in which the person is adding items that you want to bring, in a way that people can navigate the site where they display material things for sale to add and remove them from the shopping cart.
The cookies were designed to perform reliable mechanism on websites and can store passwords and content of the form that the user has previously introduced, such as number of credit card or address.
When a person enters a web page performing a cookie activity, the server sends a cookie to the browser and it is saved with the browser on the local computer. Later when the user returns to the same web page, the website will recognize the user because of the cookie the user's information is stored.
This area also deals with other websites where they use cookies to personalize their appearance according to the preferences of the person, the sites that often want to identify these characteristics, personalization, which refers to both presentation and functionality.