What is and out liner?

An outliner is a tool or software used to organize information hierarchically, allowing users to create structured lists or outlines for projects, documents, or ideas. It helps in breaking down complex topics into manageable sections, enhancing clarity and focus. Outliners are commonly used in writing, project management, and brainstorming sessions to visualize relationships between concepts and facilitate better planning. Popular outliner tools include Microsoft Word's outlining feature, Workflowy, and Dynalist.