(NOOB) Definition of "minimal and manual configuration"

I seen this advice repeated over and over.
However, even after searching, I can't find any specifics as to what "minimal and manual configuration" means.

The closest I've found is: "....just enough customization to connect to your ISP and secure the router's gui and wireless networks you have enabled."

Can anybody provide a specific list of settings that 'shouldn't be missed' in a minimal configuration?

Thanks