Product roadmaps are essential tools for product development that chart out the direction and course of creating a product. They include goals and vision, what is being worked on, release dates and timelines, the "why" behind priorities, who will work on it, and how to measure impact. There are various types of product roadmap examples such as goals-based, features-based, timeline, portfolio, scrum, epics, and theme-based roadmaps. Each type has its own unique focus and utility depending on the stage of product development and the team using it.