What is the difference between an epic, a feature, a story, and a task in project management?

An epic in project management is a large and complex task that is broken down into smaller components called features. Features are specific functionalities or attributes that contribute to the overall goal of the project. A story is a detailed description of a feature or task that needs to be completed. A task is a specific action or assignment that needs to be accomplished within a project. In summary, epics are big tasks broken down into features, which are further detailed in stories, and tasks are the specific actions needed to complete a story.