Keep track of where your money is, how much it's earning for you (and the tax man) and manage your paperwork.
Slice and dice your portfolio the way you like it!
A laundry list of all your activities in a particular folio
Juicy details of what you have earned on your investments
Your sale - purchase price - ergo your proft or loss! This is what your tax man also wants to see!
Forms and all that jazz