When it comes to writing about an area of expertise, you should make it clear what your strengths and knowledge base are. Try to make a list of your qualifications, education, certifications, and past work experience that demonstrate your expertise. Additionally, if you have accomplished anything of note in a particular area, include it too. Lastly, add any specific skills that you possess that pertain to the field.
For example, if you are writing about your area of expertise in accounting, you can mention that you have experience in auditing and financial statements analysis, as well as knowledge of a certain accounting software. You can also add that you have a degree in accounting, and have completed related certifications. Furthermore, if you have achieved any awards or awards or accolades related to the field, list it.
In the end, make sure to provide a clear explanation of why you are qualified to speak on the area of expertise. This could be in the form of providing quantitative or qualitative results you have achieved in the past. By doing this, you can demonstrate your competence and communicate why people should trust your knowledge.