There is always a risk when you make purchases online, not knowing if there could be internet hackers or frauds lurking around the corner. However, most websites that are reliable provide an option of paying with PayPal. PayPal is a service where you enter your credit card information into the account once, and when you want to make a purchase, all you have to do is log in to your PayPal account and confirm the purchase. This way, your credit card number won't be entered by the system, and PayPal acts as a barrier between internet hackers and your personal credit card number.