Baby Shark' in the Billboard Top 100 is a sign the list is moving away from radio towards relevancy

The U.S. Billboard charts have long been dominated by radio plays determined by the industry, not what consumers actually want to listen to.
This is additional taxonomy that helps us with analytics

The Science of Why 'Baby Shark' Is So Freaking Catchy

Every No. 1 song of the 2000s ranked from worst to best

Baby Shark' - catchy kids tune hits Billboard Top 40 after 2 billion

Promotion: Integrated Marketing Communication (IMC)

Cardi B - News - IMDb

Direct to Consumers (D2C) Company Trends in Retail

50 Songs that Defined the 2010s. Way back in 2009, I compiled this

Disk Dollar - American Radio History

Greater Noida: Radiology PG course at GIMS from next session