PRINCE2 Practitioner certification is for anyone managing projects. This could be as part of a formal project management function or a role in which project management is an inherent part of day-to-day work. The Practitioner certification aims to confirm that you have sufficient knowledge and understanding in order to apply and tailor the method in a range of different project environments and scenarios.
The Practitioner certificate is only one part of becoming a successful and effective project manager. It is important to ensure that this is supplemented with real-life experience working on projects, in addition to investing in their own professional development and wider training.