Ed Sheeran successfully defended his copyright court case, what is chord progression and why do so many songs use it?

Question

I watched a video where he demonstrated that many songs use the same tune / Chord progression (?). What is chord progression and why was the one in question essentially uncopyrightable?

In: 531

Answer 1

Unfortunately George Harrison got hit with this. “My Sweet Lord” chord progression is similar to another song “He’s So Fine”(?), he got sued and lost.

Chord progression is series of chords that usually underlie the melody of a song.