Answer:
It allows you to be eligible for early admission.
Explanation:
Free Application for Federal Student Aid was created in order to give financial support for the students who came from low income family. These aid is intended to help the students focus on their studies without having to get jobs in order to pay their tuition.
Early admission tend to be given to applicants with strong academic records or proven achievements in other categories (such as athletic competitions, social works, or a competition in a certain educational subject). Income level would most likely not considered as a criteria for early admission.