Why create a pool?

Pooling PLS allows us to a) participate as a validator without needing 32M PLS and b) earn more PLS than doing it solo since we'll be reinvesting the profits back in to more validators. For example, you and I can compound our validators at a faster rate if we worked together than if you and I were to validate separately. Even the whales (large PLS holders) benefit by pooling by their rewards compounding faster than doing it alone.

Once again, every time we earn 32M PLS in rewards, we are immediately reinvesting that back in to another validator. If we do that over a period of time (and assume PLS price goes up), it's quite lucrative.

This is one of the few projects where both the small & large bag holders benefit by pooling together. You should always pool your PLS when validating for maximum yield.