Cash balance is the total money held across all connected checking and savings accounts.
It is not profit. A profitable month can leave a business short if money owed to you has not been collected, and an unprofitable month can look comfortable if a large payment has just cleared.
It is also not always the same as what your books say. Money moves at different speeds through the two systems, so the figure your accounting software carries and the one the bank carries can legitimately differ — see real cash balance.