The term “cookie” was coined by web browser programmer Lou Montulli. It was derived from the term “magic cookie”, which is a packet of data a program receives and sends back unchanged, used by Unix programmers
An HTTP cookie (also called web cookie, Internet cookie, browser cookie, or simply cookie) is a small piece of data sent from a website and stored on the user’s computer by the user’s web browser while the user is browsing.
Cookies were designed to be a reliable mechanism for websites to remember information (such as items added in the shopping cart in an online store) or to record the user’s browsing activity (including clicking particular buttons, logging in, or recording which pages were visited in the past).
They can also be used to remember arbitrary pieces of information that the user previously entered into form fields such as names, addresses, passwords, and credit card numbers.
The tracking cookies, and especially third-party tracking cookies, are commonly used as ways to compile long-term records of individuals’ browsing histories – a potential privacy concern that prompted European and U.S. lawmakers to take action in 2011. European law requires that all websites targeting European Union member states gain “informed consent” from users before storing non-essential cookies on their device.
Google Project Zero researcher Jann Horn describes ways cookies can be read by intermediaries, like Wi-Fi hostspot providers. He recommends to use the browser in incognito mode in such circumstances.
However, to manage your cookies it's your choice, but you can do the following:
- deleted history or clear all the cookies on your browsers, chrome, explorer Firefox etc.
- Use ad-ons and extensions on those browsers
- Use Do No Track on the browsers
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