Cookies (also known as internet cookies, web cookies, browser cookies or HTTP cookies) are small pieces of information in the form of a text file, containing a string of letters and numbers. This file is sent from a website to the person’s browser where they get saved before going back to the same website.
HTTP cookies are essential to the modern Internet but a vulnerability to your privacy. As a necessary part of web browsing, HTTP cookies help web developers give you more personal, convenient website visits. Cookies let websites remember you, your website logins, shopping carts and more. But they can also be a treasure trove of private info for criminals to spy on. Guarding your privacy online can be overwhelming. Fortunately, even a basic understanding of cookies can help you keep unwanted eyes off your internet activity. While most cookies are perfectly safe, some can be used to track you without your consent. Worse, legitimate cookies can sometimes be spied upon if a criminal gets access.
It is used to make User Experience Better.
By keeping a record of data
submitted by user.
Used to decrease Web Server storage by
storing user data on users
computer only.
Usually cookie are safe to use.
But beware from malicious cookies.