In simple terms, what is the Yang–Mills theory, and why is it important?

Question

In simple terms, what is the Yang–Mills theory, and why is it important?

In: Physics

Answer 1

The Yang-Mills theory is used to understand elementary particles, electro-magnetic forces, and chromodynamics (theory of strong forces). Using Yang-Mills to understand the little stuff, helps us understand the big stuff/”Standard Model” of physics.

(This was hyper simplified, making it sound a bit wrong.)