A single ASIC holds only a small fraction of the total Kadena network hashrate. Without a pool, finding a block would be pure luck. A mining pool bundles the computing power of many devices across the Chainweb chains, finds blocks regularly as a result, and distributes the payout proportionally to the hashrate contributed - predictable instead of random. In return, the pool charges a fee, usually in the low single-digit percentage range.
The common models PPS, PPLNS and FPPS differ in how the risk of individual block finds is distributed between the pool and its participants - a detailed explanation is available on the mining pools overview page. For devices running continuously, the models converge largely over time; what matters is always considering fee and payout model together.
Kadena's pool landscape is currently very concentrated: only a few pools are listed, and most of the network hashrate runs through these few providers. This is likely also related to the Chainweb architecture, which a pool operator must technically support to coordinate hashrate across multiple chains. For you as a miner this means: the selection is limited, though even the few available pools differ in fee and payout model.
Besides fee and payout model, what counts when choosing a pool: how close the stratum server is to your own location (lower latency reduces the number of rejected shares), the minimum payout, and the transparency of the published statistics. Switching pools is possible at any time and takes only a few minutes: simply replace the stratum address in the miner dashboard. Customers who host their Kadena devices with Cryptohall24 choose their pool freely themselves; our team is happy to help with setup on request.