Spider-Man wasn't Marvel's first hero, but he was the first of a new breed. The Silver Age brought Marvel back to the superhero game, and while they had a lot of success right out the gate, Spider-Man represented a new level. Up until Spider-Man, Marvel's heroes were basically Cold War exemplars of what an American should be - talented people who used their gifts to help the people around them - that were role models but not really relatable.
Source：https://www.cbr.com/spiderman-biggest-moments-changed-marvel-comics/
