Can you explain to me what zones 1-8 can be used for?

The blue terminal blocks 1-8 correspond to zones 1-8 and can be used for either: Binary sensors (i.e., door, window, motion sensors, smoke), Digital sensors (i.e., temperature sensors), or 3.3V output triggers. There are up to 10 on the Pro panels (zones 1-8 plus OUT1 and OUT2)