Depends on your priorities. If you are a non techincal rider who loves fire road climbs, you can run your bars three or four inches lower than your seat. This will compromise your descending ability however, putting too much weight over the front.
If you don't care about climbing, are into drops etc you can run your bars higher than your seat.
A sweet spot appears to have the bars level with or just below the seat - allowing you to climb and descend pretty good.
All this assumes of course that your seat height is set correctly.
As far as bar terminology:
Rise - how high the bar rises over the stem height.
Sweep or bend - how much it bends back towards the rider. The right sweep puts your wrists at a comfortable angle.
Width - self explanatory. The wider the bar, the slower the steering response.
If you don't care about climbing, are into drops etc you can run your bars higher than your seat.
A sweet spot appears to have the bars level with or just below the seat - allowing you to climb and descend pretty good.
All this assumes of course that your seat height is set correctly.
As far as bar terminology:
Rise - how high the bar rises over the stem height.
Sweep or bend - how much it bends back towards the rider. The right sweep puts your wrists at a comfortable angle.
Width - self explanatory. The wider the bar, the slower the steering response.