Gantt charts are a type of project management tool that helps organize the activities and tasks involved in a project. Gantt charts are useful for planning projects and managing tasks. They can be used to track progress of a project or task, identify bottlenecks, and determine resource availability. A Gantt chart is a graphical representation of work activities over time. The name comes from the gantry crane used in factories to move materials around. It shows the timeline of an entire project as well as what must be done at what time.