What is the designated location-cleaning function of the Xiaomi Robot Vacuum S20?

Select the designated location-cleaning in the Mi Home/Xiaomi Home APP, and then select the target point on the map. The main unit will automatically plan a route to the target point, with the target point as the center, and clean a 2m×2m square area.
To set up a cleaning area for the robot vacuum, please refer to the following steps:
Open the Mi Home/Xiaomi Home APP >> select [Device card] >> tap the select area icon >> drag and drop the rectangular size >> tap [Start cleanup].