That depends upon your intended career path.
- You can’t practice as a vet, doctor, or in most teaching, social and healthcare roles without a relevant postgraduate vocational qualification.
- Some research-based careers require you to have taken a research intensive postgraduate course.
- In other cases, a postgraduate course may be seen as an example of your commitment to a specialism, or as a way of accelerating your move to professional accreditation – e.g., as a chartered engineer.
But in all cases, you need the personal abilities and commitment for the job as well as an actual qualification.