It has become accepted among NBA geeks that the hierarchy of the “best” shots, from most efficient to least, goes something like this:
1. Dunks/layups
2. Free throws
3. Corner three-pointers
4. Other three-pointers
5. Mid-range shots
Teams last season shot 39 percent on corner threes, which is about the same percentage teams shoot overall on two-pointers outside the restricted area. Teams last season shot about 35.5 percent on all three-pointers, meaning they shot something like 33.5 percent to 34 percent on three-pointers taken anywhere but the corners.
In short: The corner three is a great shot, something Spurs coach Gregg Popovich understood probably before the Internet became a thing.
Basketball is a game of finite possessions and close scoring margins. It matters if a team’s defense can chase shooters off of corner threes a couple of times per game, and limit those shooters instead to floaters or some other shot that is a) difficult and b) counts for only two points if it goes in.