Professional certification indicates a person is certified to complete a job or task or to have expertise in a particular body of knowledge, usually by the passing of an examination.
There are two general types of professional certification: some are valid for a lifetime, once the exam is passed. Others have to be re-certified again after a certain period of time.
Certification does not refer to the state of legally being able to practice or work in a profession. That is licensure. Usually, licensure is administered by a governmental entity for public protection purposes and a professional association administers certification. Licensure and certification are similar in that they both require the demonstration of a certain level of knowledge or ability.
The Department of Certification and Licensure offers courses that lead to certification, licensure, or license renewal.