Your mortgage servicer is the company that sends you your mortgage statements. Your servicer also handles the day-to-day tasks of managing your loan.
Your loan servicer typically processes your loan payments, responds to borrower inquiries, keeps track of principal and interest paid, and manages your escrow account (if you have one). The loan servicer may initiate foreclosure under certain circumstances. Your servicer may or may not be the same company that originally gave you your loan.