The dodger serves one and sometimes two functions. One through vibration and sight it draws fish close enough to see your lure. Second, on small lures and hoochies it provides action to the lure. Matching dodger and lure color is good sometimes, bad sometimes. On my favorite lake gold dodgers are by far the most effective, but the fish hit on colors. On the other hand, sometimes a small gold blade on the lure along with a gold dodger is a killer. Bottom line, it's a trial and error thing along with talking with and watching what the other guys are doing. Binoculars are a very important tool on any boat...