I thought it was something to do with stocking but apparently not. Seems odd to block the aisles with something that checks for blocked the aisles? How frequently are there "Wet cleanups on aisle 5"
(The store is "Martin's" therefore the name)
Dubbed "Marty," the in-store robots will be used to identify potential safety hazards such as spills of liquid, powder or bulk food items in store aisles and to issue an alert for clean up.