Sudo Write is an AI writing assistant that helps writers improve their work. It offers various features like Describe, which helps create vivid descriptions, Story Engine, which guides writers through the process of writing a novel, Write, which generates text in the writer's style, Expand, which helps with pacing, Feedback, which provides actionable suggestions for improvement, and Brainstorm, which generates ideas and suggestions. Additionally, Sudo Write offers tools like Canvas for planning and Visualize for bringing characters and settings to life. It aims to support and enhance the writing process for authors.