In the old days, advertising mainly involved text and occasionally a logo here or there. Colors were limited to one or two on fancy paper. Now, four color offset printing on bright white paper is the standard. This allows for full color photography.
Thru the years I have become a much better photographer as I have photographed many products for clients. I have Canon DSLR cameras and special lighting. Chroma Color Backgrounds allow me to replace a solid green or blue background with a photograph or illustration.