The Green Goblin is a fictional character, a comic book supervillain in the Marvel Universe and the archenemy of Spider-Man. Created by writer Stan Lee and artist Steve Ditko, the character first appears in Amazing Spider-Man #14 (July 1964).
The first, current, and best-known Green Goblin is the alter ego of industrialist Norman Osborn. A serum that grants Osborn superhuman strength also drives him insane. Osborn adopts a Halloween themed appearance, dressing in a goblin costume and using an arsenal of high-tech weapons, notably grenade-like "Pumpkin Bombs and Razor Bats" and a bat-shaped "goblin glider" to terrorize New York City. He is one of Spider-Man's most recognizable foes and is widely regarded as his deadliest enemy, having much impact in Spider-Man's life, and posing a large threat to him and his loved ones.
Having said all that, this torrent is not about Norman.
When the previous Green Goblin (Harry Osborn) dies from the side effects of a modified Goblin serum. His equipment and the identity of the Green Goblin are then briefly used by Philip Benjamin "Phil" Urich (nephew of Ben Urich of the Daily Bugle), who tries to gain a reputation as a superhero, although he is sometimes seen as being as maniacal as his villainous predecessors. This 13 issue miniseries features Phil's career as the Green Goblin.