"Three Point Lighting". It is vastly used in studio photography and by snobby fashion photographers. Good basis for any portrait photograph. Key light: Usually the strongest light;sets the lighting of the scene. Fill light: helps fill the shadows that the main light casts. Backlight: used to create a contour and separation. It is common to use a snoot or a gridspot on the backlight to avoid a spill.
An overview of a classic three-point lighting setup used in portrait photography. Learn a lot more about photography by signing up for my free newsletter! http://www.edverosky.net/blog/free-newsletter/