Files in the Dropbox folder can be added, edited and deleted, which will then sync to the site and other devices.
Using the site only is also possible, for users who don't have admin permissions to install the app, or just need to access files from the site when they're on another computer without Dropbox. Files changed on the site would also sync to other syncing devices.
There is also the mobile app for viewing files on your account and editing them too, as well as automatic camera uploads.
If you need any more details, feel free to message back!
I checked one of our 6 computers and there was one of them that recognized the updated files that I had added in my attempt to do a test to make sure that it wasn't my computer/files that were being compromised.