What is the purpose of the System Definitions- System Parameters-Approval Level Numbers field?

When 0,1,2 level approval is used in the processes, the first approver is 2, the last approver is 0. It is considered a level. At these levels, multiple users or user groups can be added. This parameter determines how many users will be able to give consent at what level. For example, 0. If there are 4 users at the level "0", if "2" is written in the number part of the "0" in the confirmation level, 0. It is enough for any two people at the level to give their consent for the process to be approved.