Answers:
Almost all free websites will allow their advertisers to use tracking cookies. It is one one the reason Yahoo is a free service. It is how they earnings their bills, clear their workers and provide a profit to their stockholders.
But, Relax!
Cookies are a short time ago small .txt (text) files that by themselves cannot hurt your computer. Cookies are "set" by almost every web-site that you look in, on every pop in. You can delete adjectives your cookies today and by tomorrow you will enjoy dozens again only just be visit web-sites.
Cookies do not slow down a computer, at lowest the first million or so that you might enjoy on your computer!
They are not a virus or spyware, BUT some ancestors consider "tracking" cookies to be an invasion of privacy.
Tracking cookies are usually "3rd do cookies" from exposure servers. They can track your movements around the net within establish to deliver to you customized, targeted selling.
It adjectives depends on ones personal plane of paranoia whether you consider tracking cookies some benevolent of threat.
If you are using Internet Explorer for a browser, you can for good block adjectives 3rd knees-up (tracking) cookies. Go to tools > internet option > privacy > advanced > check-mark "override automatic cookie handling" > third gathering cookies > tick "block" > ok > ok.
Children are the individuals that are other the most uptight nearly cookies. Because cookies are an effortless opening for Mommy and Daddy to find out exactly what their honey 'lil b@$^@#d$ hold be looking at on the net.
Personally, If I appear to remember it, I will delete my cookies every 6 months or so :-)
Cookies are much ado in the region of nothin'.
Maybe 'explanation it's free
Presumably so that personalized content can be displayed to you (like if you own spanking new emails or not, and different advertisements).