The thumbs up symbol that you see on the rates shows the "Sales Message" entered on the rate description when the guest hovers over it.
Here's an example of the thumbs up symbol
To enter the sales message on the rate description follow these steps:
1. Go into the Booking Engine Service
2. Under Rate Management click Browse Rates.
3. Click  on the rate you want to enter a sales message
4. On the General Tab under Rate Sales Messages enter the Sales Message you want to show on the thumbs up symbol.
5. Save Changes
The sales message will now show when a guest hovers over the thumbs up symbol beside the rate.