Short answers, pulled from the story.
Trap music originated in the Southern United States, with Atlanta, Georgia as the central hub. The genre takes its name from the Atlanta term "trap house", a place where drug deals are made. Lyrical references to the trap appeared as early as 1991, while the modern trap sound emerged in 1999.
T.I. claims to have coined the term trap music with his second album Trap Muzik, released in 2003. Early pioneers include producers DJ Paul and Juicy J, Mannie Fresh, Shawty Redd, Zaytoven, and DJ Toomp, along with rappers Jeezy and Gucci Mane. Lex Luger is credited with popularizing the modern trap sound in the 2010s.
Trap music is built around the Roland TR-808 drum machine, whose bass drums are tuned with a long decay to emit a low bass frequency. The sound features complex hi-hat patterns at double-time and triple-time subdivisions, crisp snare drums, synthesized drones, and cinematic arrangements of strings, brass, and woodwind. Typical trap beats are programmed around 70 BPM, which produces a felt tempo of approximately 140 BPM.
Trap music reached mainstream popularity in the 2010s. By 2018, hip-hop had become the most popular form of music in the United States for the first time, according to Nielsen Data, coinciding with trap's peak dominance. Artists including Drake, Kendrick Lamar, Future, Travis Scott, and Migos all reached number one on the Billboard Hot 100 with trap songs.
"Old Town Road" by Lil Nas X, featuring Billy Ray Cyrus, spent 19 consecutive weeks at number one on the Billboard Hot 100, making it the longest-running number one single of all time on that chart. Released as a remix on the 5th of April 2019, it surpassed records previously held by Mariah Carey and Boyz II Men's "One Sweet Day" and Luis Fonsi and Daddy Yankee's "Despacito". It also became the fastest song to receive a Diamond certification.
Trap influenced pop and R&B artists including Beyoncé, Ariana Grande, Lady Gaga, Katy Perry, Rihanna, the Weeknd, Miley Cyrus, and Sabrina Carpenter. Ariana Grande's "7 Rings" spent eight weeks at number one on the Billboard Hot 100 in 2019, and her album Sweetener, which incorporated trap elements, won the Grammy Award for Best Pop Vocal Album. Trap has also influenced reggaeton and K-pop.