When discussing makeup, the “coverage” of your foundation refers to the opacity of the foundation. If your skin is even and has minor discoloration and blemishes, then only a light opacity of foundation is typically required. This is called "sheer coverage".
For individuals struggling with scarred skin, dark spots, or the need to hide tattoos, a heavier opacity will be required to cover up any imperfections. This is called “full coverage”. Full coverage is also perfect for individuals that struggle with facial birthmarks, hyperpigmentation, and acne scars. Makeup for general use usually contains only 35% pigment, while full coverage makeup can have up to 50% pigment.