Possibly if you use an ad-blocker (or maybe if you don't) you've encountered this irritating popup:
Cookies are small files saved to the user's computers hard drive that track, save and store information about the user's interactions and usage of the website. This allows the website, through its server to provide the users with a tailored experience within this website.
Users are advised that if they wish to deny the use and saving of cookies from this website on to their computers hard drive they should take necessary steps within their web browsers security settings to block all cookies from this website and its external serving vendors.
Other cookies may be stored to your computers hard drive by external vendors when this website uses referral programs, sponsored links or adverts. Such cookies are used for conversion and referral tracking and typically expire after 30 days, though some may take longer. No personal information is stored, saved or collected.