It is used to describe food and can also be used to compliment someone's appearance, though it's less common.
Here are some other ways to say "it is very delicious" in Spanish:
* Está deliciosa: This is a more formal way to say "it is very delicious."
* Es muy sabrosa: This means "it is very flavorful."
* Es muy buena: This means "it is very good" and can be used to describe food or other things.