"A "press kit" and a "promo-pack" are essentially the same thing. However, each serves its very own purpose. The press kit is most commonly used to inform the media about an artist. It consists of certain promotional materials that are used by the media to create interesting stories or "write-ups" about an act. The "promo-pack" is simply a variation of a "press kit." It's used for booking shows, "shopping" for record deals and publishing deals, assembling a management and legal team, and for gaining radio and television airtime."
http://www.jmipub.com/press_kits.html
The Promo Pack is essentially what it says, a pack to promote the band. A typical Promo Pack will Include:
- Artist/Band Biography
- A Photo of the Artist/Band
- Fact Sheet
- A Demo Tape/CD
- Song List
- Lyric Sheet
- Copyright & Contact Info
All of these material can be handed out to a number of people for a number of reasons, such as trying to get record deals and radio or television airtime.