Disclaimer: The concept of a product roadmap is vast and quite nuanced. However, this article will be focused on working with a product roadmap in Jira. As such, I am coming from an assumption that you already have a roadmap and are ready to transition your vision into Atlassian’s Project Management software.
If this is not the case, please refer to this detailed guide that talks about product roadmaps in general and come back when you are ready to create a product roadmap in Jira.