Professional development refers to continuing education and vocational training after a person enters the job market.
The purpose of professional development is to give professionals the opportunity to learn and apply new knowledge and skills that can help them in their work and advance their careers. Professional development is about building your skills and knowledge base in whatever field you are in.
By taking advantage of professional development, continuing education and career planning, you are already ahead of a third of your peers. Because you go for it and take ownership of your career, you are much more likely to succeed and achieve your goals.