@Edvaner0 I think it's a challenge to word this in writing so as not to have it backfire. The percentage thing is weird. The examples I have seen that wouldn't likely offend or backfire are humourous. Like 1* means the place should be bulldozed and the host thrown in jail. Or just give it as general information- that the Airbnb rating system isn't meant to be a comparison to hotels or anything else, but reflect how their stay went, in which case, 5*s would mean it was clean, comfortable, accurately advertised, and the host was suitably responsive.
When I have had conversations about it with guests, it's been an organic thing, something that comes up easily in conversation if we might be discussing Airbnb- past stays they've had, what it's like to host. There's plenty of guests who I didn't have a sit around and chat relationship with, and it's not anything I would pointedly bring up.
And I don't talk to them about the ratings because I want them to rate me 5*s, it's the hypocrisy of Airbnb leading guests to think a 4* rating is fine, then turning around and threatening hosts over them that burns me and that I think guests should be made aware of.
There are hosts who will decline a repeat guest who left a 4* rating (which I would never do), even though the guest was quite a good guest. I think guests should be made aware of that. If they liked the place and the host and would book there again, but left a 4* rating, not realizing how much that distresses some hosts, they would start leaving 5*s for places they liked and had no complaints about. And they wouldn't run the risk of getting declined by that host in the future.
If they think a place only deserves 4*s, that's fine- guests should never be made to feel pressured to leave 5* reviews. What isn't fine, IMO, is for them to be under the impression that is something hosts or Airbnb consider to be a sought-after, pleasing rating.
The bottom line as I see it, is that if a host is "educating" guests about the ratings, with the intention of getting them to leave you a 5* review, it's very difficult for that to not to come across as manipulative. If you are "educating" so that hosts and guests are on the same page as far as understanding the rating system, in an impersonal and lighthearted way, it can work.