Some payment processors are worldwide, some operate in select countries. The companies who handle all of that in the few seconds while your order confirmation loads are payment processors. Banks communicate with each other, funds are transferred safely, account numbers and personal details are kept confidential, and sometimes currency needs to be (accurately) converted. Don't let payment processing trip you up-let us give you the scoop on how it works to get you started in style. Setting up an online store should be easy and fun, but figuring out the best way to handle money can slow things down.