Web Application Feature
This Feature will activate ShortPoint engine on the web application. All sites in this Web Application will have ShortPoint activated on them automatically.
ShortPoint - Site Feature
This feature will activate ShortPoint Inserter, Generator, Change the look and other features on the same site.
Note: Activating "ShortPoint Foundation Settings" feature from site settings might take few minutes to take effect, so if it happened that right after the activation, ShortPoint is not working on site pages, we recommend that you wait for few minutes, and then try to refresh the page again ( more info in the article "ShortPoint Insert Button Grayed Out / Dashboard Page Tiles Not Showing" )