Producer Bob Rock, who was brought in for his work with bands like Motley Crüe and Bon Jovi, played a significant role in shaping the album's sound. His insistence on perfection and more mainstream approach was a departure from Metallica's earlier thrash metal productions, leading to tensions but ultimately a highly polished sound.

"The Black Album" was a commercial juggernaut, becoming Metallica's best-selling album with sales of over 16 million copies in the United States and over 35 million worldwide. Its success was bolstered by hits like "Enter Sandman", "The Unforgiven", and "Nothing Else Matters."

"Nothing Else Matters", one of the album's most enduring hits, was a departure from Metallica's traditional sound. Written by James Hetfield, the song originated as a personal piece he never intended to release, showcasing a more introspective and vulnerable side of the band.

The recording process for "The Black Album" was notoriously challenging and lengthy, lasting over a year and costing over $1 million. The band and Bob Rock clashed frequently, leading to a tense atmosphere that pushed everyone to their limits but ultimately resulted in a groundbreaking album.