Nothing is happening, and that is the point
The property is empty. No tenant, no damage, no reason for anyone to call you.
We go anyway, once a month. Every tap is run and every toilet flushed, so the traps do not dry out and the drains do not smell. We look for damp, for a leak under a sink, for a shutter that has worked loose. We air the place out. You get dated photographs of a property that is exactly as you left it.
What you do Nothing. This is what the monthly fee buys.