What is "fishing float"

A float, also called a bobber in the United States, is an item of angling equipment that is attached to the fishing line which serves several purposes. Firstly, it can suspend the bait at a predetermined depth; secondly, due to its buoyancy, it can carry the baited hook to otherwise inaccessible areas of water by allowing the float to drift in the prevailing current; and thirdly, a float also serves as a visual bite indicator. Fishing with a float is called float fishing.