"Knowledge areas" refer to specific fields or areas of expertise in which someone has detailed knowledge and understanding. It is a way to categorize and organize different areas of knowledge. Full definition
Your work experiences will measure the relation of your qualifications and knowledge areas in the requirements of the job position that you are applying for. (template.net)
The applicant will have completed a minimum of ninety (90) clock hours of academic coursework in sexuality education, covering general knowledge in the Core Knowledge areas listed below. (aasect.org)
Clearly this is a key knowledge area for practical competence in the real world. (educationworld.com)