This analytical tool allows golfers to assess their putting performance relative to a defined baseline, typically other golfers of similar skill levels. It quantifies the impact of each putt, measuring the difference between the actual number of putts taken and the expected number of putts from a given distance, based on historical data. For instance, sinking a 20-foot putt would result in a significant positive value, indicating a gain relative to the average performance from that distance.
The primary advantage lies in its ability to provide objective and granular feedback on putting proficiency. It moves beyond simple putting averages, offering a more nuanced understanding of strengths and weaknesses on the green. This enables golfers to identify specific areas for improvement, such as lag putting, short putts, or reading greens effectively. Its development stems from broader efforts to apply statistical analysis to golf, offering a more data-driven approach to improving performance and understanding the nuances of the game.