Moonvy is an AI-powered online design management and collaboration tool. It allows users to easily manage and deliver design resources, collaborate with team members, and export design annotations and style code for developers. Users can organize their design files using folders and tags, view files in different formats, and provide feedback directly on the design. Moonvy also offers features like canvas-based file management, multiple viewing options, online file preview, and integration with design tools through plugins. It aims to improve design productivity and facilitate seamless collaboration between designers and developers.