When a new stakeholder joins the board of directors and is impacting the project's progress, it's crucial for the project manager to ensure that the stakeholder is fully informed about the project, its objectives, and its current status. By presenting the project to the stakeholder, the project manager can ensure that the stakeholder is aware of the project's goals, timelines, and deliverables, and that they understand the impact that their decisions may have on the project. This will help the project manager to manage the stakeholder's expectations and ensure that their influence on the project is aligned with the project's goals.