if you are already in the habit of sweeping regularly, then you may not have any huge need for a dust mop. a dust mop really does function like a broom in many ways, so you will be using it to do the same thing that you are likely already doing.
a dust mop can be more convenient to use than a broom, though. you can glide a dust mop across your floor very smoothly, picking up dirt and dust along the way. it will be a very handy tool when you are just trying to tidy up the floor quickly. owning a dust mop makes cleaning up a little bit 