@Pete3178 On page 12 of the following post there is a rundown of what the review process looks like for guests (it's exhausting 😣).
https://community.withairbnb.com/t5/Hosting/the-very-first-question-asked-of-the-guest-in-the-review...
If you're wondering how you could get a 4, rather than a 5, from a guest who left a glowing written review and appeared very happy with their stay, well....you are not the first (and certainly won't be the last) to ponder that question, as a quick search of this forum with some key words will reveal.
It is a bit disheartening to receive anything less than 5 but have no feedback to go along with it. How is one to know what needs improving?