Best-selling albums are music records that have achieved high sales figures, often reaching millions of copies worldwide. These albums are typically measured by their sales in physical formats, digital downloads, and streaming equivalents. Notable examples include Michael Jackson's "Thriller" and The Beatles' "Abbey Road", which have both topped global sales charts. The success of a best-selling album can be attributed to various factors, including popular singles, critical acclaim, and effective marketing strategies. Many of these albums have left a lasting impact on the music industry and continue to influence artists today, showcasing the power of music to connect with audiences.