|BRG - Best Rate Guarantee||
BRG stands for Best Rate Guarantee.
The hotel makes a promise that the room prices found on their website are the best rates compared to other any other sites.
Hotels implement the BRG policy, to drive consumers to book directly via their own website, instead of the third party OTA. OTA's are of course giving the same promise as they want to encourage consumers to book their hotel stay with them.
The policy in general outlines that if within 24 hours of making a reservation, a customer finds a lower hotel rate for the same hotel, room type and reservation dates, and submit a qualified guarantee form, the hotel should match the rate and give you an extra discount on the room.
The best rate is of course relative, as it does not have to be lower, the same rate is also the best in this case.