A Project Manager (PM) plans, executes, and closes projects, ensuring they finish on time, within budget, and meet goals by defining scope, managing resources, leading teams, mitigating risks, and communicating with stakeholders, acting as the crucial link between management/clients and the project team. Key duties include project planning, scheduling, budgeting, tracking progress, resolving issues, ensuring quality, and optimizing processes, requiring strong leadership, organization, and communication skills.