If you roll a dozen balls at a hole from thirty feet away, it’s likely that you will notice two things…
1. The overall size of the pattern (the greatest distance between two balls) = Variance = Precision
2. The apparent “center” of that pattern (where the balls would all gather by rolling the shortest distance to each other) = Bias from the target = Accuracy
You can use this as a simple proxy for your “Putting Capabaility”.
Some factors affect both result metrics… some factors affect accuracy more… some factors affect precision more.
You can use the quick visual feedback of the pattern to help you diagnose what is going on with your “Putting Process”.
You can also evaluate your pattern as it logically affects your actual putting performance in terms of “Strokes Gained… or Lost!”