Terp pearls allow the wax to vaporize at a lower temperature. Since terpenes vaporize at a lower temperature than the other substances in wax, pearls help preserve terpenes. This can drastically improve the taste of your dabs.
The pearls provide multiple benefits, by adding another hot surface to the interior of the banger where the air is cooler than the hot surface. They push the puddle around to keep it moving to constantly find more hot parts of the surface. Additionally, they aid the heat retention within the banger so that you can maintain the perfect temperature dab for longer. Finally, the terp pearls also spread the heat more evenly which allows for vaporization at lower temperatures rather than burning in a few hot spots.
Swirl your pearls!