Credit Cards are the most popular form of payment simply because there are more poker sites that accept credit cards than anything else. There are many different types of credit cards out there and most of them can be used to play online poker or online casino games at your favorite site. The most common credit cards are Visa and MasterCard.
Visa and MasterCard is a great way to make a deposit into your poker account. However some cards may be blocked due to current legislation. Typically, only deposits can be made with Visa and MasterCard, not withdrawals.