Define what needs managing

Timeline.
Task ownership.
Freelancers or vendors.
Stakeholder communication.
Dependencies.
Approvals.
Risk tracking.
Delivery reporting.

Authority matters

A project manager cannot coordinate effectively if nobody knows which decisions they are allowed to make.

Look for relevant operating experience

Managing a software build, creative campaign and administrative operation can require different instincts.

Project management should reduce coordination cost.If the manager creates more reporting than clarity, the process may be heavier than the project requires.

Establish reporting expectations

Define what the buyer needs to know, how often updates happen and which problems require immediate escalation.