Skylight is a performance monitoring tool designed specifically for Ruby on Rails applications. It provides developers with detailed insights and analytics to help improve application performance by identifying slowdowns and bottlenecks. Skylight offers features such as request breakdowns, endpoint analysis, and database query monitoring. By focusing on simple integration and providing actionable data, Skylight enables developers to optimize their applications efficiently. The platform is accessible at [skylight.io](https://www.skylight.io).