Guidance Explorer is a tool that allows users to discover, compose, and consume development guidance. It connects to the patterns & practices guidance library containing checklists and guidelines for .NET, ASP.NET, and ADO.NET applications. This enables developers, testers, architects, and managers to access up-to-date and relevant guidance to improve security and performance during tasks like design, implementation, and deployment. Users can also add custom guidance to the library to share within their team or organization.