In my opinion host communication is a cultural thing. In some countries like for example Finland communication is at a minimum. There is no small talk and if they have nothing to say they don't. Polite questions such as "How are you today or Is all ok" are non existing.
My communication with booked guests include:
1. Thank you message for booking during Corona times include House manual, since I do not enter the place after having disinfected it. Message also incl. extras incl. prices. I also tell the guest that I will be in contact with them a day before arrival concerning check-in times
2. Day before arrival message about check-in time.
3. First morning checking if all fine in the place.
4. Message for check out procedure during the evening before check out.
As a guest I appreciate some drinking water bottle (if one cannot drink it from the tap).
I do treat my guests to some veggies from my green house in the summer. If I have some left over cake or other meals I do offer also and it is always appreciated from guests. Does not cost anything,-)