A money market account (MMA) is a type of deposit account offered by banks and other financial institutions. It is similar to a savings account, but usually pays higher interest rates and has more restrictions on withdrawals.

Money market accounts typically require a higher minimum balance to open and maintain the account, and may limit the number of withdrawals or transfers per month. The interest rates on MMAs are variable, meaning they can change over time depending on market conditions.

Money market accounts are considered low-risk investments, as they are insured by the Federal Deposit Insurance Corporation (FDIC) or National Credit Union Administration (NCUA) up to certain limits. However, they are not risk-free and can still be affected by changes in interest rates or other economic factors.

Overall, MMAs can be a good option for those looking for a safe place to store their cash and earn a modest return. It's important to compare rates and fees among different institutions before opening an MMA to ensure you're getting the best deal.