A display apparatus is provided, including a communicator configured to communicate with an external user terminal apparatus, a gaze tracker configured to track a user's gaze, and a controller configured to determine a position of the user's gaze based on first gaze tracking information acquired by the gaze tracker and second gaze tracking information received from the user terminal apparatus. The controller is further configured to request information regarding an event that has occurred in the user terminal apparatus from the user terminal apparatus based on the determination result.