Haha yeah this was me before I started learning about makeup. I didn't know makeup can be so complicated. If you have no idea about those stuff, it will really make you confused with what they are doing especially if they're not explaining what they're putting on their face. :D

Concealer is pretty simple though, just to hide whatever you want to hide, conceal or cover up. :D They are optional of course, since some products can hide those you wanna hide without concealers or you just don't really want to cover anything. They indeed boost confidence and overall it's fun to do something or to feel like you have a control over how you want to appear or something.

Thanks for reading even though you're not that familiar with them. I hope you learned something at least haha and maybe at some point you'd be interested in them, so you can use this small knowledge in the future. :P