The most useful skill for a project manager will depend on the job. No two jobs are the same, so even if they have the same job title, it’s important to read what the employer is looking for in a candidate before submitting.
If we were to choose a universal skill that’s important across project management jobs, however, it would be communication. Effective communication is at the heart of many aspects of a project manager’s responsibilities and contributes to the success of a project in different ways.