Another reason is because you will receive a fixed interest rate on your loans and only one interest rate as opposed to multiple interest rates over multiple loans. (studentloans.net)
The new loan will offer a single monthly payment at a fixed rate instead of multiple payments with multiple interest rates. (studentloans.net)
This also means a single interest rate instead of multiple interest rates, simplifying things further, which is where the term «refinancing» comes into play. (lendedu.com)