Makeup Tips.. How to apply foundation. I would imagine that being a makeup newbie in today’s world is pretty tough. Social media makes it seem like every girl out there is a beauty pro, but that’s far from the truth: there are still tons of girls who don’t know the difference between concealer and foundation. I was that girl once too! I remember what my life was like before I discovered the magic of a good foundation, and it makes me want to cry.