A resource is an item that can be accessed on your website. It could be an article, a file, a contact form...
To restrict access to a resource, it is necessary to identify that resource (a few resource types are available out of the box with the extension, others are downloadable).
When a visitor or logged user buys access to a resource, a link is sent for further access. The email address used is the one associated to the user account (if the user is identified) or the email address associated with the payment gateway for a guest.
