So, a professional photographer is a person who knows exactly what he shot, why, in what way, which method he used, equipment, and under what conditions each image was created in his portfolio.
My works Contact mePhotographers are creative professionals who typically work in specific environments where they capture one or more types of subjects. Before you start your career as a photographer, it's important to find your niche, which is the focus area you want to work in as a professional.
A professional photographer does it to get paid but what they offer is still art because it takes composition, lighting, and effects which is a form of art. It's also a service but people pay them for their art style.