A project roadmap is a visual tool that provides a strategic plan of a project's goals and deliverables over a deadline. It is a guide that lists all tasks of the planned schedule that must be completed for specific projects according to iteration and continuous integration.
Project roadmaps are used to detail steps and make realistic and logical projections of the main stages of a project, and its evolution.
Moreover, they should include objectives, milestones, deliverables, resources, and timelines for a breakdown structure of the steps to take.
Here is an example of a project roadmap: