Generally the bill on the crankbait lure allows it to dive to a pre defined depth. This lure often features a bill on the front that looks a lot like a duck.

How To Use A Crankbait For Bank Fishing Crankbait Guide

3 Ways To Use Crank Baits Wikihow

How To Fish A Crankbait Five Tips For Better Crankbait Fishing

Crankbait Fishing Tips Everything You Ever Wanted To Know About

How To Fish Square Bill Crankbaits Flw Fishing Articles