A cookie, also known as an HTTP cookie, web cookie, or browser cookie, is a piece of data stored by a website within a browser (eg: Internet Explorer, Google Chrome, Safari, Firefox, etc.) and then subsequently sent back to the same website by the browser. Cookies were designed to be a reliable mechanism for websites to remember things that a browser had done there in the past.
Although cookies cannot carry viruses and cannot install malware on the host computer, tracking cookies, and especially third-party tracking cookies, are commonly used as way to compile long-term records of individuals’ browsing histories – a major privacy concern that prompted European and US law makers to take action.
There are basically four types of cookies a website can create within your browser:
For further information on cookies please refer to www.allaboutcookies.org.