'Cookies' are not in general a good thing to allow on your computer.
They allow the 'planter'of the cookie to track your use of the internet and of all the sites you visit.
Cookies are an essential part of websites, and they
do not allow other websites to track your useage of the other sites you visit. They are generally used just to keep you "remembered" on a site, so that settings are set for the next time you visit, or even very basically so that you can navigate from page to page.
Large "pornrings" are generally on massive webservers and they share tracking cookies so they can serve up even more filth and target adverts according to your browsings... Naturally, we wouldn't expect any of our users to be using such sites, so they should not be concerned about how these companies operate. On the plus side, the police can use cookies to catch people looking at things they shouldnt.
Our cookie is called rootschatcom, it just stores your RootsChat userid number and the current date so that you do not need to login each time, or each time you change pages. This, and to credit adverts to publishers, is the use for the great majority of cookies for almost every website.
Trystan