West Coast jazz is a style of jazz that emerged in the 1950s, primarily in California. It is characterized by a relaxed, laid-back sound, often featuring lighter instrumentation and smooth melodies. Musicians like Chet Baker and Dave Brubeck were influential in shaping this genre, which often incorporated elements of cool jazz and bebop. This style is known for its emphasis on improvisation and sophisticated harmonies. West Coast jazz often includes a blend of traditional jazz elements with influences from classical music, creating a unique and accessible sound. The genre gained popularity through recordings and live performances, contributing to the broader jazz movement.