Peter Parker's first true love in the Spider-Man comics. Stan Lee intended for Peter and Gwen to be together and for Mary Jane to be her competition, but when Stan Lee went on a trip overseas, another writer killed Gwen off. Stan Lee was not happy when he returned and heard about it. Nonetheless, her death became an overrated seminal event and kicked off comic book writers lazily killing characters for shock value and many people who never read the old comics only knew MJ and never knew about Gwen until Emma Stone wonderfully played her in the Amazing Spider-Man film series, where the death was unfortunately recreated because of its overrated status and we had to lose a compelling, strong, and smart female character.
Gwen Stacy was a great character and shouldn't have been killed off.