From their early beginnings, The Police were hailed as a maverick live band- a group that galvanized an already impressive studio sound into something  otherworldly when performing. Combining controlled energy and evocative melodies, Sting, Stewart Copeland and Andy Summers played with the improvisational instincts of a jazz trio and the raw energy of a punk rock band – a blend that made them one of the definitive rock groups of the ´70s and ´80s.
source: http://www.thepolice.com/biography