Professional knowledge

Expertise is in-depth skills, knowledge, and experience in a specific field. It is achieved through study, research, and practice in that field. Professional qualifications to talk about each person's ability and knowledge for a certain field, reflecting on the levels of professional training in the field. Many majors today require certain professional qualifications such as bachelor's, master's or intermediate, college.

Specialization and specialization can be distinguished as follows: Specialization is the skills and knowledge that have been trained and the application of those skills in a full and methodical manner to a specific profession or field. Whereas, a specialization is a specific field within an industry, which can include a variety of specialties.

Examples of professional qualifications include: primary professional qualifications, intermediate professional qualifications, college professional qualifications, university professional qualifications, master's and doctoral professional qualifications.