Federal Student Aid is an office of the Department of Education that manages applying for and receiving financial aid for attending school. You might be familiar with their website https://studentaid.gov/, or the FAFSA form (Free Application for Federal Student Aid) that determines financial aid eligibility. They also oversee grants, work study, scholarships, and other school funding options.
Anyone with federal student loans can access their comprehensive loan history and details through Federal Student Aid by creating an account on their website.