A "Breakthrough Album" refers to a music album that significantly elevates an artist's career, often leading to widespread recognition and commercial success. This album typically showcases the artist's unique style and creativity, resonating with a larger audience than previous works. Such albums often feature hit singles that gain substantial radio play and streaming numbers, helping the artist to establish a solid fan base. Examples of breakthrough albums include Taylor Swift's "Fearless" and Nirvana's "Nevermind", which transformed their respective genres and solidified the artists' places in music history.