Billboard was founded in 1894(as Billboard Advertising) & progressed & developed with the passage of time. That's why it is called #1 in the world.
BTS made huge groundbreaking records in Billboard too. Details are below:[Source]
*First Group and Ninth Act overall to simultaneously hit #1 on the Artist 100, Hot 100 & Billboard 200.[Source][Source][Source]
*BTS is at #6 in the“Most Weeks Spent at #1 on the Artist 100, Hot 100 & Billboard 200 Simultaneously”.[Source]
*First Act to hit #1 in Hot 100, Billboard 200, Artist 100, Social 50, Global 200, Global 200 Exc. US, US Digital Song Sales, US Top Album Sales, US Independent Albums, World Albums, World Digital Song Sales simultaneously.
*BTS is the Artist having the most songs(5) going #1 on all 3 Charts: Billboard Hot 100, Global 200, and Global 200 Excl. US Charts(Dynamite, Life Goes On, Butter, PTD, My Universe).[Source]
*"Dynamite" became one of the 14 songs to spend 100 weeks in BB Global 200. It also became one of the 12 songs to spend 100 weeks in both BB Global 200 and Global Excl. U.S. Charts.[Source][Source][Source]
Billboard 200
Breakdown of BTS' albums that have charted on the top 10 of the Billboard 200: Link
HYYH Part 2 was the first BTS album to chart at #171 in 2015.(Dark & Wild charted in #27 in 2014 while HYYH Part 1 charted in #6 in the USA Heatseekers proving that BTS has been growing its popularity since 2014: 1 year after their debut)
BTS is the first Asian Act to get #1 in Billboard 200.
BTS is the 2nd foreign/non-English language Act(Andrea Bocelli was the first) and 19th Act(from the 2010s) ever to achieve simultaneous #1 album in both the UK and US with MOTS: Persona.[Source][Source]
BTS is the 1st non-English Act to get #1 album in both UK and US with MOTS: 7 in the 2020s.[Source]
BTS is the first Act(recording primarily in a foreign language) to get the most #1 albums(2→6) charting in BB200 overall.[Source]
MOTS: Persona is the first non-English EP to get both a #1 in BB200 and a RIAA Certification.(Check Billboard 200 Wiki history and see the #1 EPs which got RIAA)
BTS is one of those few artists who've scored three #1 in BB200 in under a year. Other artists who achieved that include Elvis, The Beatles, The Monkees, The Glee Cast & The Kingston Trio.
BTS is the first act to send multiple foreign language albums to #1 on the Billboard 200 in a single year.[Source]
BTS is the first non-English Artist to get multiple #1 albums on the BB200 within the same calendar year(2018).[Source]
BTS is first non-English Artist to get multiple #1 albums on the BB200 within the same calendar year for the 2nd time in 2020.[Source]
BTS got three #1 albums in the US(10.3 months), surpassing The Beatles. They are just behind the Monkees who got three #1 in just nine months and three weeks.[Source][Source][Source]
BTS is the first group to earn three #1 albums in the US in less than a year since The Beatles in 1996.[Source][Source]
BTS is the 3rd fastest group to get four #1 Albums in BB200 after The Monkees and The Beatles. BTS is the Group to get four #1 albums in the shortest time since The Beatles.[Source]
BTS is the fastest group to generate five #1 albums since The Beatles(1966-1968).[Source]
BTS is the fastest group to generate“first five” #1 albums since The Beatles(1964-1965).[Source]
More BB200 records made: MOTS: Persona[Source]; MOTS: 7[Source]; BE[Source]
MOTS: Persona is the 7th EP to get #1 in BB200 in history.[Source][Source]
BTS currently holds five #1 albums from a total of 11 foreign albums which got #1.[Source]
BTS is the First Pop Act since 2014 to get two #1 Albums in less than a year in BB200.[Source]
MOTS: 7 scored the biggest week for an album by a group after 4 years in 2020.(The last time a group did it was by 1D in Dec 2015).[Source]
The last Artist to get four #1 albums faster than BTS(2020) was Future with one year and seven months. He got his 4th #1 album in March, 2017.[Source]
BTS is the fastest Artist overall to generate five #1 albums in Billboard 200 since Future(2015-2017).[Source]
BTS is the first Asian Act to get #1 in 2 different main USA Album Chart Organizations with a non English Album(BB and HDD).
BTS are the first artists to get a #1 in BB200 with a primarily foreign album since 2006(in over 12 years).(In 2006, Il Divo topped the list with Ancora). They broke a record of 12 years that no foreigner managed to conquer.[Source][Source 2]
Excluding classical crossover albums from Josh Groban and Il Divo, LY: Tear was the first album in 23 years to go #1 in BB200, the previous being Selena’s Dreaming of You in 1995.[Source]
BTS is the first Asian Act to reach double-digit appearances on Billboard 200.
The whole Love Yourself Series(3 albums) debuted in the top 10 Billboard 200.
BTS is the first Asian Act(5th non English Act) to chart two albums on the Billboard 200 simultaneously(happened first with'Love Yourself Her' and'Love Yourself Tear').[Source][Source 2]
BTS is the first ACT to get #1 in both BB200 and BB World Albums at the same time(excluding movie soundtrack albums).[Source]
BTS is the ACT to get #1 in both BB200 and BB World Albums at the same time(five times).
BTS is the first Asian Act(7th non English Act) to chart on the US Billboard 200 and Hot 100 simultaneously.
BTS charted for 8 consecutive weeks in both Hot 100 & BB200 with an Asian language album & single.
LY: Her has the highest entry peak for an Asian Album at #7 on Billboard 200 without the use of physical sales(LY: Her charted with only digital sales and streams on week 1).[Source][Source]
LY: Answer is the longest charting #1 non-English album in BB200.
LY: Answer is the overall longest-charting Asian album on Billboard 200.[Source]
LY: Answer is the first Asian Album to complete 1 year in the Billboard 200.[Source][Source][Source]
LY: Answer is the first Asian album to spend 100 weeks in the Billboard 200.[Source]
MOTS: 7 is the 2nd Asian album after LY: Answer to spend one year in the Billboard 200. BTS is the first Asian Act to have 2 albums with over 1 year charting in the Billboard 200.[Source]
Billboard