Clear breakdown of the total cost with VAT and all City taxes clearly displayed at some point through the booking journey.
In order to successfully use Google META Search, the VAT and all city taxes should be displayed at some point during the booking process in the booking engine. This is a requirement from Google when you want to use META Search: https://support.google.com/hotelprices/answer/6064432?hl=en
If you don't have this, your website might be penalized, because the hotel is not allowed to show in the top positions in META.
Review of Mews Search starting and in exploration phase