Short answers, pulled from the story.
Spider-Man was first introduced to the public in August 1962 when the comic book Amazing Fantasy #15 hit newsstands. This issue featured the character created by writer-editor Stan Lee and artist Steve Ditko.
Writer-editor Stan Lee and artist Steve Ditko created the character Spider-Man, though artist Jack Kirby disputed the narrative and claimed he developed a character called the Silver Spider in the 1950s. Lee stated he wanted to create a character who could age and chose the name Spider-Man to distinguish him from typical teen sidekicks.
The death of Gwen Stacy in The Amazing Spider-Man #121 in 1973 marked the beginning of the Bronze Age of Comic Books. The Green Goblin threw Gwen from the George Washington Bridge, and Spider-Man's attempt to save her resulted in her neck snapping from the sudden stop of his webbing.
Spider-Man encountered an alien symbiote on an alien planet during the Secret Wars miniseries in the mid-1980s, which initially appeared as a black costume. The symbiote returned in the form of Venom after merging with Eddie Brock, a former reporter who had become obsessed with Spider-Man.
The marriage of Peter Parker to Mary Jane Watson took place in 1987 but was later erased from the timeline in the One More Day storyline. Editor-in-chief Joe Quesada made the decision to erase the marriage and all memory of it through a pact with the demon Mephisto to save Aunt May's life.
Spider-Man generated global retail sales of licensed products reaching approximately $1.3 billion in 2014. The character has appeared in animated television series, live-action films, video games, and educational materials, making him one of the most profitable fictional characters in the world.