Answer:
Cosmetics are basically make-up or beauty products.
Advantages:
They can hide blemishes, discoloured skin, scarring etc.
Can make you appear different, pretty or even give you natural look.
It's also really fun to put make-up on if your a girl.
Disadvantages:
This depends on your skin type but if your skin is sensitive then finding the right make up suited for your skin may take a while and be quite expensive.
Make-up usually welcomes acne, pimples and dry skin.
If not applied correctly it can give you a real fake look.