Ground Beta is a training course that emulates a standard urban area, with streets and buildings. Several of its buildings also contain monitoring rooms in their basements, where indoor exercises can be observed.
Ground Beta was the main setting of the Battle Trial Arc, where the trials took place inside the course's buildings. The exercise consisted of two opposing teams of two going against each other, simulating a confrontation between heroes and villains. The "heroes" were tasked to infiltrate the building and recover a warhead prop, which was defended by the "villain" team.
Later, at the end of the Provisional Hero License Exam Arc, the ground was used as the setting for a battle between Izuku Midoriya and Katsuki Bakugo, with Katsuki having chosen the place specifically because of the Battle Trial Arc, where he had suffered a loss against Izuku. The fight was found out by a patrolling security robot, alerting Shota Aizawa. All Might, however, let the battle proceed and spoke with both boys after it was finished.