Power Chords are one of many favorite chords to play on bass because they are so versatile! It can be used to create a quick change in a bass line or to create whole songs.
These three noted chords are comprised of the root, 5th and octave. They are written with the note name and a 5 after it. (Ex. A5; F#5)
These can be used with any type of scale because they are not comprised of any specific scale. These can be broken down and played as arpeggios as well.
I have found these to be used a lot in rock and metal music. I have incorporated these chords in my own songs and when I transpose other music.