What is the difference between booting modes

Hello everyone

I got my great Smart Gateway DSGW-380 Edge computer.
I would like to learn everything about it before we enter it to my projects.

This Gate way has RK3588
I would like to ask here about does our device support these starting-up modes (Boot) and when do we need each mode?
1- Normal Boot
2- Recovery
3- Loader
4- Maskrom

Mode Supported? To start the mode
Maskrom Yes 1- Connect USB cable to USB OTG port. 2- Press and hold the factory reset button. 3- Plug the power. 4- After the device starts release the button.
Normal mode Yes Plug the power it will start normally
Loader ?
Recovery ?

Picture of the button need to be pressed

Thanks you