playlists and folders

Under Maintaining Your Mezzmo Library it states 'Playlist/folders: Click this checkbox if you want to maintain the text metadata and artwork for playlists and folders in your Mezzmo library."

One thing about Mezzmo that I like is that it maintains the native folder structure from the external drive I have attached to my W10 PC. In general the folders/files I see via File Explorer are replicated in Mezzmo. What is "the text metadata and artwork for playlists and folders"?

Mezzmo will try to get text metadata and images for folders/playlists containing series.