What does EP and promo mean on a CD or vinyl record?

Extended play (EP) refers to a musical recording that contains more than one song but is shorter than a standard album. EPs typically have a track list of three to six songs and are released as stand-alone projects or as a precursor to a full-length album. EPs allow artists to experiment with new musical ideas, release new material more quickly, or bridge the gap between albums.

Promo refers to a promotional copy of a CD or vinyl record that is sent out to radio stations, music journalists, and other industry professionals for promotional purposes. Promos are typically marked as such on the packaging or the disc itself to distinguish them from commercial releases. They are not intended for sale to the general public and may include exclusive tracks or bonus content not available on the commercial release. Promos are used to generate interest and buzz around an upcoming album or release and are an important tool in promoting new music.