Final answer:
In makeup routines, foundation and eye makeup are two steps that many would not skip as they create an even canvas and accentuate the eyes.
Step-by-step explanation:
When a girl is doing her makeup, there are certain steps that are generally considered essential; however, it's important to remember that makeup routines vary greatly depending on personal style and preference. That said, two steps many would not skip are the application of some form of foundation to even out the skin tone, and defining the eyes with products like mascara or eyeliner. Foundation serves as a base for the rest of the makeup and helps to create a smooth, even canvas, while eye makeup helps to accentuate the eyes and can make a significant difference in the overall look.