As a homeshare host, I have sometimes mentioned to guests how Airbnb looks at ratings differently for hosts than what they tell guests. Yes, Airbnb does have guidelines they give guests for star ratings, but what most guests don’t know is that while Airbnb tells guests 4* means “Good”, that 4.7 is the “target” for hosts and less than 4.8 will lose a host their Superhost status.
If one is going to mention ratings to guests, either verbally or with something written, it’s important not to come across like you are shilling for a 5 star review- I would be put off by that as a guest. So when I have talked to guests about the review system, I make sure to tell them that of course they should rate a place according to how they experienced it, but that they should also be aware that Airbnb doesn’t consider a 4* average to be “Good” when it comes to hosts.
And also to keep in mind that ratings should be based on a place being accurate in its description, providing what they promised and the host being responsive to any issues- not based on amenities, location, etc, that the guest would have liked to have, but which weren’t offered in the first place.
One guest was shocked when I told her that 4* wasn’t considered good enough for hosts. She said she had rated 4* for places she had stayed that she liked perfectly well and would book again, thought 5* was reserved for something over-the-top fantastic, and thought the hosts would be happy with a 4* review.
She thanked me for cluing her in, said she felt terrible that she might have lost a host their Superhost status, and said she’d be sure not to leave less than 5* again for a place and host there was nothing wrong with.
Another guest said his sister was a host, so was aware of the disconnect between the standards Airbnb holds hosts to compared to leading guests to think 4*s is a “Good” review.
But I will say that by no means have I had the “review discussion” with more than a small fraction of my guests, only if it develops organically in the course of conversation. And I have always gotten 5* reviews- maybe because I tend to get experienced guests and few newbies.