Effective technique is the principal pillar to a faster swim. One workout per week should be focused on drill work so you continue improve your swimming.
Fins provide the necessary support to allow you to focus on movements you are trying to develop during swim drills. The extra propulsion allows the swimmer to relax and concentrate. Sometimes swim fins are characterized as “cheating.” This is the wrong way to look at them. Like a pull buoy, fins are a tool that, when used purposefully, support technique development.
The next question is what kind of fin. I recommend Finis Floating Fins. These fins provide considerable propulsion without having to kick very hard. If your pool does not have these fins, I would recommend adding a pair of these fins to your swim kit.