Money Market accounts typically offer a much higher rate of return than savings accounts. They invest in super safe securities such as short term bonds and t-bills. They are completely liquid (you can make withdraws whenever). I highly recommend opening a money market account simply because you earn 2% or 3% more than a savings account. They also adjust to the current interest rate much faster than savings accounts which typically move like molasses on a winter day.
What is the difference between a savings account and a money market account?