Windows 11 includes the default General items, Documents, Pictures, Music, and Videos templates used to optimize the layout and view of every drive, folder, or library.
Windows 11 uses Automatic Folder Type Discovery to detect the contents of a folder and automatically optimize the folder for the proper template. If a folder contains a mixture of file types, Windows will use the General items template. If there is an overwhelming number of files with the same file type in a folder, Windows will automatically optimize the folder with the proper template to match the majority.
A template is just a default layout and view, you can customize the layout and view of a folder to how you like in File Explorer.
This tutorial will show you how to manually change the template of a drive, folder, or library for your account in Windows 11.