It doesn't take a genius to work out wobbling provides one of the fastest ways to cover all the options. If you've tried it all and takes don't come up sticks. Ring the changes, keep on the move and the takes should come. Some of them will nearly wrench the rod out of your hand. Others will just be signalled by a couple of gentle taps on the rod tip, or as slack line tightening when it shouldn't, or even tight line slackening faster than it should.
Some fish hook themselves.
One minute you're retrieving the bait, the next you're on auto-pilot, playing a fish. Less violent takes need a hard sideways sweep of the rod to set the hooks. Whatever you do you'll lose fish wobbling. Some days, it can leave you feeling like your abilities to play them stinks. Sometimes they're on with a great swirl that screams double and off again before you can blink.