PayPal - Overview
PayPal is the most commonly used online payment method in the ecommerce world.
There are several integrations available, and the one(s) you choose will depend on your needs.
PayPal Express is the most commonly recommended integration. It allows your customers to pay by their credit card or PayPal account, which they do offsite (not on your website). You can ask questions about this payment method on the support subforum for PayPal Express.
PayPal Website Payments Pro allows customers to enter their credit card details on your site during the checkout process. This more seamless experience is preferred by some vendors, but has a fee and minimum requirements. Talk to your PayPal account rep to see if this is a good choice for you. You can ask questions about this payment method on the support subforum for PayPal Website Payments Pro.
PayPal Standard (sometimes also called “PayPal Website Payments Standard” or “PayPal IPN”) was the earliest PayPal integration, and is no longer recommended because it is less reliable. See PayPal Standard - Potential Problems for details.
PayPal RESTful is the next generation of PayPal integration, which is expected to replace both PayPal Express and PayPal Website Payments Pro. It is currently still in development. You can ask questions about this payment method on the support subforum for PayPal RESTful.
A new feature called payment module retirement is available to ease the transition between PayPal Website Payments Pro and/or Express to PayPal RESTful.
See the FAQ PayPal Standard, Express and Pro - what’s the difference? for a deeper discussion of the three older integrations, as well as some information on other PayPal offerings.
Where can I learn more about PayPal?
PayPal provides a series of Help Guides with information about how to handle common situations.
More information about the various PayPal services can be found on the PayPal website.