All About That Base
Once the face is primed, the canvas is ready for the foundation. As with most products, there are different types of foundation with different purposes. Aside from the examples in the picture above, there are also tinted BB creams, CC creams, and also spray/airbrush foundations.
There are also different levels of coverage, skin benefits for the various skin concerns, finishes (matte, dewy, illuminated, semi-matte, etc.), as well as multiple ways to apply foundations using particular brushes or sponges.
For the most part, foundations are used to even out the skin. Some might stop there or use this as the basis for the rest of their makeup look.