Cookies

A cookie is a piece of data that a website will send to a web browser. Its purpose is to save customized information on a user to make their browsing experience easier. Cookies are saved as text strings on a user's machine. They are not harmful to a computer, and they cannot transmit viruses. However, if there are security vulnerabilities on the website that collects a user's cookies, it can be used by an individual to track the user or otherwise gain access to their data.

References
 * 1) HTTP cookie. (2018, March 26). Retrieved March 27, 2018, from https://en.wikipedia.org/wiki/HTTP_cookie
 * 2) Beal, V. (n.d.). What are Cookies and What Do Cookies Do? Retrieved March 27, 2018, from https://www.webopedia.com/DidYouKnow/Internet/all_about_cookies.asp
 * 3) What is an Internet cookie? (2000, April 01). Retrieved March 27, 2018, from https://computer.howstuffworks.com/internet/basics/question82.htm