Computer Support.


Small data files placed on your PC by a website that you've visited. A cookie can store your personal information after you enter it online.


 For example, if you type in your credit card number, a cookie might store it till you come back next time.


This is not a bad idea - most shopping sites use cookies completely legitimately so you don't need to keep entering your personal details. But problems can occur when other people decide to use your credit card too!