It establishes the origins of Robin in the DCAU and features a flashback in which Bruce Wayne relates with his newly fostered son, Dick Grayson, over the shared grief of losing their parents.
DC characters have been around in popular consciousness since the very first Superman comic, Action Comics #1.
Curiously, Batman and Robin were in Super Friends ... order to watch all eight shows and six movies that are part of the DC Animated Universe, also known as the Timmverse or DCAU.