https://www.cnet.com/news/giant-food-stores-rolling-out-googly-eyed-helper-robots-nationwide/

Marty roams the store unassisted to flag spills and other hazards using image capturing technology, according to The Washington Post. When it finds them, the robot will reportedly alert customers by saying "caution, hazard detected." It'll also announce the incident through the store's public address system to notify employees, the Post said. 

Giant Food Stores ran a pilot program with the robot in two of its Pennsylvania stores last year.