Milestones are tools used in project management to mark specific points along a project timeline. A project milestone is a task that shows an important achievement in a project. The milestones should represent a clear sequence of events/steps which take place until the project is complete.
Project milestones are a way of knowing how the project is advancing, especially if you’re not familiar with the tasks being executed. These are the points which can note the start and finish of a project, and mark the completion of a major phase of work.