The PayPal payment plugin include 4 products :

What is the difference between the PayPal products?

Standard

{article PayPal Checkout}{text}{/article}

PayPal Payment Pro

{article What is PayPal Payment Pro?}{text}{/article}

PayPal Hosted Pro

{article What is PayPal Hosted Pro?}{text}{/article}

Express checkout

{article What is PayPal Express Checkout?}{text}{/article}

PayPal Sandbox

Setting up a testing environment in PayPal