Depends what you're doing with it. You can just glue this dev board in to your hobby system, or if you're making an interactive kiosk, maybe you want a usb webc

Depends what you're doing with it. You can just glue this dev board in to your hobby system, or if you're making an interactive kiosk, maybe you want a usb webcam & hdmi screen. If you want to debug, those ports can be pretty handy, you can have a monitor and keyboard on it. If you do your own pcb integration, you can decide what ports you want on your board.