Floats (also called Bobbers) are popular with many trout anglers. In fact, every trout angler ought to have a few in their tackle box. Floats (or Bobbers) are typically used when trout are feeding just under the water's surface. That's because floats are ideal for keeping your baited hook near the water's surface. And the best part is that you can lengthen or shorten your leader to increase or decrease the depth you'd like to fish at.
Floats come in different shapes and sizes. If you've never fished with one before, the video below shows you the basic setup for trout fishing.