What does it mean that the hotel needs to pay for the room online in the next few days?

There is an additional online room rate difference for staying at the hotel on the following dates:

In the next few days, the hotel needs to pay the extra room rate difference online, which means that on some special days, such as Friday and Saturday, the hotel price will rise and tourists need to pay the extra room rate difference. In some legal holidays or holidays, the hotel does not provide preferential room rates, and tourists need to pay extra for the difference.