Robert William Gary Moore was a Northern Irish musician. Over the course of his career, he played in various groups and performed a range of music including blues, blues rock, hard rock, heavy metal and jazz fusion.

Blues rock is a fusion genre and form of rock music that relies on the chords/scales and instrumental improvisation of blues. It is mostly an electric ensemble-style music with instrumentation similar to electric blues and rock. From its beginnings in the early to mid-1960s, blues rock has gone through several stylistic shifts and along the way it inspired and influenced hard rock, Southern rock, and early heavy metal.