Short films are made for several reasons: to gain experience, demonstrate skills, and pursue a career in filmmaking. They are shown to friends, family, and peers; used as show reels to attract sponsors and funding; and screened at film festivals and on some television channels and in cinemas. Short films help emerging directors and producers gain recognition and build their portfolios, as evidenced by the careers of directors Spike Jonze and Joe Nussbaum, who both began with short films before finding success with feature films.