Navigating Folders
Each folder is labelled, you can view the folders in list format or by tile format by clicking the ‘All Documents’ drop down in the top right of the screen.

The document section of the screen, tells you the file name, when it was last modified, and who modified it.
You can drill down into each folder by clicking on it.
You can return back to the previous folder level by clicking the previous folder title here:

From this screen you can share, copy link, sync, download, add short cut to OneDrive, export to Excel, and more.
You can even set up alerts to receive notifications when documents, files or folders have been accessed and modified by clicking the 3 dots (...) along the tool bar and click ‘Alert Me’.