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

4 Chords has already been shared multiple times, but he was also just on Howard Stern explaining what he did for the Jury.

If you want to hear it straight from the songwriter’s mouth: https://www.youtube.com/watch?v=NcCKlsTgjeM