Is An American Express Card A Credit Card

Does American Express apply as a Visa or MasterCard? 3

I tried to buy something online and it says you are using MasterCard or Visa. And I don't know what to do !! I can't buy or what?

Or

American Express is another credit card company.

How to find

Many merchants do not accept Amex because they charge high fees.

Not so This is the American Express.

Is An American Express Card A Credit Card