Hi, let me explain my way to you.
An adjective looks like a cosmetic. A noun looks like a girl.
If a girl doesn't wear some cosmetics, she will not be an attractive girl.
If she wears so many cosmetics(=lipstick, eye-shaw etc), she will be quite pretty.
Like cosmetics beautify girls, adjectives beautify nouns.
a beautiful girl
a pretty girl
a fat girl
a thin girl
a tall girl
an attractive girl
The adjective modifies the nouns.
I really hope that help you.