A roadmap is a high-level graphic summary of a project. It aids in outlining the goals and development of a certain product offering over a given time frame. This roadmap explains both the what and the why of what you are building. It serves as both a strategic compass and a roadmap for carrying out the product strategy.
A roadmap has several objectives, such as articulating the vision and strategy, serving as a manual for carrying out the strategy, bringing internal stakeholders into the agreement, facilitating discussion and option and scenario planning, and assisting in communication with external stakeholders, such as customers.
A simplified version of the roadmap is sometimes shown as a flow diagram with development targets in boxes and rough completion dates. It identifies the many phases of key product development milestones.