What in the worl are you talking about?
Last year I started keeping track of my putting practice sessions. I would keep notes on how many times I hit metal(cage & above,no pole) or made the putt(flushed it) and then figure out my percentages in an effort to track my improvement over time. It was very time consuming so I had a guy write an app to keep track of it for me. At first it was going to be for me and a few friends but I got carried away with it and figure we would publish it. I now have 1000's of putts over different terrains and conditions I can look back at and see what I did to improve over time. It has been a great tool to help improve my putting skills.
Just trying to do my part to help grow the sport.