What are 'folders of this type' in Windows 10?

after more digging I think I understand the types of folders that exist in Win 10:

to find what type your folder is

1. right-click on empty space in file explorer and select 'Properties'
2. go to 'customize' tab

under 'optimize folder for:' there are 5 options:

- general items
- documents
- pictures
- music and 
- video

now, the question was to make sure that all folder types show 'details' view. you have to go through the "Apply this view to all folders of this type" for every one of the 5 types.