Hi, I’m Jermaine.
Your potential clients like to see the person or team behind your business, employers/casting directors like to see who they might well be working with and co-workers like to see who they ‘are’ working with. When these people look at your LinkedIn profile or social media, your website or your company's UC platform internally, they are subconciously building ‘trust’.
Who would you like them to see when they look at ‘your’ photograph? It'll differ depending on your individual purpose or your industry - some might wish to project a certain level of professionalism, others a warm, friendly demeanour. In addition, I think we all wish to portray a level of confidence, confidence that we can 'deliver' within our chosen fields and that we are somebody whom they would enjoy working with.