Fed decisions affect borrowing costs for mortgages, credit cards, auto loans and business loans across the economy.
The Fed is the nation's central bank, and one of its main jobs is to keep prices stable by raising or lowering interest rates.
The Fed aims for about 2% annual inflation, a benchmark it views as consistent with stable prices and steady growth.
Raising rates to cool inflation can slow hiring and growth, while cutting rates can boost employment but risk higher prices.
The Fed's policy committee sets a target range for the rate banks charge each other overnight, which ripples through other interest rates.
Congress directs the Fed to pursue both price stability and maximum employment, a balance that can require trade-offs.
Fed governors serve staggered terms to insulate monetary policy from short-term political pressure, though the president nominates them.