: Unlike many rock riffs that use standard power chords, Blackmore played this using parallel fourths , plucking the strings with his fingers rather than a pick to get a sharper, more distinct "snap".

The track peaked at and remains one of the most successful rock singles in history, selling over 23 million units worldwide. Its influence is so pervasive that it is often the first song beginner guitarists are forbidden from playing in music stores due to its over-saturation.

Music fans often recall the song as a turning point in their musical journey.