I've tried to figure this out before, but for the most part all I can find is that it is intrinsic angular momentum, but it does not mean that something is spinning physically. Also, how do spin values of 0 or half-integer spin work? Is it just that particles with spin values of 1/2 only turn 360 degrees after 2 rotations. because I've heard people say this before; and does a spin of 0 just mean it has no momentum, or that it is physically congruent no matter how it is perceived?