Do you want to charge visitors for downloading files from your website?
Previously this might have been too complicated so you decided it was easier to make the downloads available for FREE? However, with Easy Digital Downloads plug-in for WordPress you can make downloads available to people who pay you for access via PayPal.
The plug-in makes it all really easy so any site owner can activate it on a site powered by Word Press.
For more information visit the website for Easy Digital Downloads.