J. Jonah Jameson is the editor-in-chief of the Daily Bugle, a New York-based newspaper in the Marvel universe. He is highly distrustful of Spider-Man and sees him as a menace. Jameson seeks to expose the wall-crawling hero as a fraud, but at the same time is completely unaware that one of his own employees, the photographer Peter Parker, is Spider-Man.
Jameson has gone to extensive lengths in his efforts to take down Spider-Man, though these efforts have generally been unsuccessful. Some of his projects have also backfired horribly. He once paid a private investigator to undergo a procedure to become a superhuman able to defeat Spider-Man, but the process created the villainous Scorpion as a result.