A roadmap is simply a list of the work you plan to do within a specific time period. Your roadmap can be for any length of time you think is reasonable, but typically they are in the range of three months to one year. On your roadmap, list out anything that you think is important for people to know is coming. Features are an obvious addition to any roadmap, but you can also add bug fixes, documentation updates, integration tasks, and more. People just want to know how you plan on spending your time to improve the project going forward, and a roadmap lays this out for easy reference.