Hotel name or area in city>click hotel. (make sure you toggle price to show total with fees in Google hotel)
It will show you multiple booking sites and prices. You can always check which room which site has...
OFTEN AGODA is best price, best room 60% of the time. Booking is agoda parent company. They will get about 20% share. Then there is trip, vio, traveloka, momondo, Trivago, that usually have deals aswell.
Clearly I am making these percentages up. But it's kinda the truth
Straight up. All booking sites have advertising they send out to entice you to get that price. Regardless when you book it's still a fantastic deal even if you don't get advertise price.