The benefits of using a clipless pedal is that you can actually do things like pull up when you're riding. You can push down with one leg and pull up on the other, so you become more efficient on your cycling too. You can push harder. If you're climbing a hill, you can push harder and not worry about your foot slipping off the pedal then also.
Having a clipless pedal may prevent some injuries of slipping off the pedal and then falling off the bike. Having a clipless pedal may also help with the performance in terms of being more efficient in your pedaling stroke also.
