Paint finish, gloss level, sheen and enamel all refer to the same thing. They describe the smoothness and the way the paint reflects light. There are about 6 different sheen types and each of them have different light reflecting qualities. These sheens include:
Flat or Matte
Eggshell
Satin
Low luster
Pearl
Semi-gloss
High gloss
Each sheen has different qualities and uses. You can discuss paint finish options with your painter to determine the best finish perfect for your house. A flat or matte finish gives the surface a velvety look and is usually applied on the ceilings. The higher the sheen or gloss, the easier it is to clean the surface, but it can also make imperfections more visible.