BML stands for Beat, Meet, Lose and is used for the ratio for rates between the Brand.com and the channels.
BEAT shops are marked with yellow and these are the cases when your hotel offers a lower price than the other channels and in such a way it beats the OTA. As a result, you will most likely get more direct bookings as you provide the clients with a lower rate, but actually, the beat case shows that the situation with the Brand.com can be improved and you could probably increase your rate and be in line with the other channels.
MEET shops are green and they indicate that your hotel has the same price as the other channels, which means that Brand.com is in parity with the OTA.
LOSE shops are marked with red and these are the cases when your hotel offers a higher price than the OTA. It means that the OTA is undercutting you and as a result, you may lose your direct bookings. Lose case indicates that there is a rate parity issue with the OTA and you need to act in order to resolve this problem.
NA shops are marked with gray and these are the cases when Brand.com and OTA are sold out.