This is placeholder text, not legal advice. Replace it in Admin → Pages, and make sure it describes the cookies this site actually sets.
A cookie is a small file a site asks your browser to keep. On the next visit the browser hands it back, which is how a site can tell it is you and not a stranger.
Some pages load things from other companies — maps, payments, sign-in — and those companies may set their own cookies. Their policies govern those, not this one.
Every browser can block or delete cookies in its settings. Blocking them is your right; signing in will stop working, because staying signed in is a cookie.
If we start using a cookie for something new, this page changes first.