Best available rates is a pricing model, commonly used by hotels to provide the lowest possible rate to a consumer on a given date.
This involves hotels analysing the current market conditions such as demand in a certain area and time of stay, to price a room accordingly. As this pricing strategy is based on ever changing variables, the price of a room can fluctuate throughout a day.
Best available rates essentially provide consumers with the most appropriate room cost at any given time by predicting the demand for rooms and lowering or raising the price accordingly.