Contouring and shading are makeup techniques used to define and enhance facial features. Contouring involves applying a darker shade to areas of the face that you want to recede, creating the illusion of depth and structure. Shading, on the other hand, involves applying a lighter shade to areas of the face that you want to highlight and bring forward. Both techniques can be used to create a more balanced and harmonious appearance. Contouring and shading are essential skills for makeup artists and beauty enthusiasts alike, and with a little practice, anyone can master these techniques to achieve a flawless, sculpted look.