Some of the credit card companies use a special code for verification purposes. This is the VCode. You will find it on the back of your card, usually at the right end of the signature area.
The general rule for identifying the VCode is that it is the last portion of any number in the signature block which is not part of your account number. The number of digits will depend upon the credit card, but it is usually 3 or 4.
Providing this code will expedite your charge and thus your receipt of your order.
When you are done with this help window, just close it to return to your order.