Pretty good article that talks about the benefits that can help hosts save money.
Did your guest leave the heat on way too high thanks to that cold front last week?
Turn it down with your smart thermostat from anywhere in the world. Windows or door left open?
Have your phone alert you with a smart open / close sensor so you can make sure your home is secure even after your guests have left.
Do you have a closet or room in your home that you only want certain people (i.e. not your guests) to have access to? Or how about just wanting to send your guests their own front door entry code that you can then revoke once their stay is over, saving you from dealing with keys or meeting up with them? Smart door locks have you covered.