Admittedly, Batman: The Animated Series skipped Jason and went right to Tim Drake for the post-Dick Grayson Robin (presumably to avoid the darkness of the Jason Todd stories) and the recent string of animated Batman movies has skipped both Jason and Tim in favor of Damian Wayne becoming the second Robin, but Jason Todd is still a name that a whole lot of people know as one of the Robins.
The second Robin was brutally beaten to death by the Joker in a decidedly dark comics run that changed Batman forever.
Jason’s tragic story was adapted into the animated Batman: Under the Red Hood movie in 2010, touched upon in Batman v Superman in 2016, incorporated into the Arkham Knight video game, and hinted at in Young Justice.