Criteria for students housing

[Francesco Barbati]

Hello BiggerPockets crowd! 

I have decided (but always ready to change my plan) to buy and hold to rent to students, and focus around the university in the city I live in.

What are the criteria to choose the best property? How it differs from other kind of renting? What should I add/change to the equation to make a profitable deal?

I am new and any kind of advice or consideration (even if very basics ones) would be very appreciated!