Answer:
Step-by-step explanation:
It usually modifies a noun. It makes the noun more distinctive.
The red house (that cuts out a lot of houses that aren't red).
The run down mansion. (that tells you quite a bit about the state of the mansion. Whoever owns it has run out of money).
The Green Goblin. That should not require any explanation. What is a Goblin anyway?
Little red ridding hood.