I‘ve been using makeup sponges for years, I personally love to apply my foundation with a makeup sponge.
On one hand the makeup sponge absorbs water, it become wet, helps to correct and conceal concealers among other things, other hand also absorbs less of the product you are applying,
I love the finish it provides. Keeping looking natural, fresh even on hot days.
For using a makeup sponge to apply concealer, I’ll apply the concealer where I want it and again, stipple the product into place. Just lightly bounce over and over and work that product into the skin.
Foundation could end up looking a hot mess without them.
This is specifically for makeup beginners learning
SOFTER & BOUNCE BACK QUIKER