A Looper Pedal is a simple floor-based recording device that records your guitar playing and loops (plays) it back through your amp, over and over.
Essentially, the looper pedal has three jobs:
1. It records a Primary Loop (a guitar part).
2. It loops (plays) this primary loop back through your amp over and over.
3. It records additional guitar parts (Layers), which it then also plays back over the top of your original recorded part.