HTTP or browser cookies are a piece of web browsing to reliably store data about your time on a website. Virtually every website will store a small amount of information on your computer so it remembers what you have done when browsing the site. Perhaps the most common use for cookies is to store login status. So next time you don’t have to re-login every time you leave the page. Cookies can also remember what you put in your shopping cart, or which links you already clicked. These types of cookies are entirely benign, making browsing more convenient.
Tracking Browser Cookies