Web Cookies

A Web Cookie is a small text file that is placed on your computer by the website you visited. It can track what you’ve clicked on a website, your login information and so on. There are two types of cookies, first-party cookies, and third-party cookies. First-party cookies are set by the website you are visiting. Third-party cookies are embedded into a different website. For example, Ads embedded on Facebook can also access cookies that generated by Facebook or leave their own cookies.

Good or Bad
Cookies are neither good nor bad. Originally, they were used to save preferences, like language, without having to select which language you prefer that website to be in every time you visit the page. They could be harmful today because of the amount of data a cookie can hold. Cookies now hold an immense amount of data on people to learn more about the user, and make tailor made ads for an individual person. They track every click on a link, every item added to a persons online shopping cart, and more to collect information on people.