Cookies are small little texts files (.txt) and they are put onto your computer by just about every website you visit on the internet. Even if you were to delete all your computer cookies right now you will get a few more with a few click of the mouse. Cookies are mainly used for personalization such as quick login to a website you visit regularly. Here’s a guide on how to delete cookies if that’s what you want.
There is no harm in cookies, they do not slow your computer down or contain any viruses or spyware although some anti-spyware programs will list “Tracking Cookies” as a minor threat to your computer because they consider these to be invasion of privacy. Tracking Cookies are third party cookies delivered by advertisers and is used to track your movement online and deliver relevant ads based on your surfing habits. If this bothers you than you can block third party cookies through your browser. Although many sites require cookies to be allowed to function properly.
Cookies are highly over-rated and you shouldn’t worry about them to much unless you have something to hide or maybe a little paranoid because other people can easily see the sites you visited by looking at your cookies. Mmmm cookies.