Billboard charts are a series of music rankings published by Billboard magazine, which track the popularity of songs and albums in the United States. These charts are based on various factors, including sales, radio airplay, and streaming data, providing a comprehensive view of what music is trending. The most well-known chart is the Billboard Hot 100, which ranks the top 100 songs across all genres. Other charts include the Billboard 200, which lists the top albums, and genre-specific charts that highlight the best performers in categories like Pop, Rock, and Hip-Hop.