New Relic helps Battlesnake players monitor their snake's performance, server, and web application in real-time, allowing them to improve its strategy and make it more competitive. To do this, users need to create a New Relic account, instrument their Battlesnake with custom code, and then analyze the data using dashboards that provide insights into the snake's performance, survival rate, growth, and server status. These dashboards can be customized to show more or less information and are useful for tracking response time, improving code, and gaining a competitive edge in battles. By using New Relic, users can gain a better understanding of their Battlesnake's behavior and make data-driven decisions to improve its performance.