Adding to David's excellent explanation the B can also be called as a passing chord. A passing chord is any chord(s) that connects two diatonic chords:

https://en.wikipedia.org/wiki/Passing_chord

PS - I have a guitarist friend who calls anything other than a 1-4-5 chord a "b a s t a r d" chord!


My goal this weekend is to move just enough each day so that no one pokes me to see if I'm dead or not.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware