"Don't think like a fish, think like bait."
Jig fishing, or jigging, is the the art of using an artificial bait to mimic a live bait. I don't like live bait. Especially if I can use a bait I can re-use over and over again. And one I can change quickly if there not hitting it. That's where jigs come in.
Jigs are two parts the head and the body. Put them together and you have something that should resemble a fish. One on the prey side of things.
The head is basically a hook with lead or steel on the tie end. They come in all shapes, sizes and colors. Try and use one that will mimic whatever bait is fed on by the fish you're trying to catch.
The body is usually some form of a plastic that completes the look of the bait. Fresh water they make them to look like worms, crayfish, frogs, and small minnows. Salt water mostly look like smaller fish.
There're a million different color combinations. It depends on what you're after. Where you are. The type of water. Water clarity. Sky conditions. All of this factor into which jig I use.
As a general rule, though, chartreuse is good in salt water. And brackish water. Well, it's a good place to start. The beauty of jigs is that you can change colors and styles simply by putting on another body. And you should change often. Till you find what they're hitting. Then stay with it. Don't be hardheaded.
You can try and make it look like a fish swimming through the water. I generally try and make mine look like one that's injured. Fish will go after the easy meal. If they see food already hurt that's the one, they'll hit.
So just try and imagine your jig going through the water. A little switch or two. Reel. A big twitch. Let it sink. Twitch, twitch. Sink. Big jump. This technique works in salt and fresh water. Bass love that little twitching worm or frog. So do speckled trout.
With a little luck, and a lot of practice you'll get the art of jig fishing down in no time. Or a lot of time. Really depends on how often you go. In prefect world I could go every day. Just me and. But your prefect day of fishing is completely up to you. It's still better than a day at a job you don't like.