This page allows you to see the files that are attached to this customer/work address in a list view. Any documents that have been uploaded that are associated with the address or the customer are indexed in this tab.
You can add a new file using the 'Add new file' button in the top right of this section. This will open a page where you can upload a file. Please read the green text carefully as it tells you what files can be uploaded. The maximum file size you can upload is 30mb.
The 'plus' icon next to the file in the list opens a set of options: Delete, View, Download.