A project plan is a formal document that outlines the scope, goals, and objectives of a project. It is used to provide guidance and structure to the planning process, and it serves as a communication tool between project stakeholders. The project plan is typically created by the project manager or team leader, and it should include details such as a timeline, cost estimates, resources required, and any risks associated with the project. The project plan is essential to the success of the project, as it provides an outline of what needs to be done and when it needs to be done. It should also be updated frequently to keep everyone informed of any changes or updates that occur throughout the project. By having a clear project plan, teams can avoid miscommunication, save time and money, and ensure the project is completed within the desired timeframe.