A mining pool bundles the computing power of many participants and distributes block earnings proportionally - this makes payouts predictable. The distribution of shares is more than a statistic: a single, highly dominant pool is unfavourable from a network perspective, because it weakens decentralisation. Anyone choosing deliberately therefore considers fee, payout model and network share together.
For miners in Germany and Europe, alongside fee and payout model, the proximity of the stratum server matters most: low latency reduces the number of rejected shares and therefore the silent loss of yield. Many large pools operate European servers - checking the provider's server list belongs before signing up. Switching pools is possible at any time within minutes; even with hosted devices, Cryptohall24 customers retain free choice of pool.
Every network has its own pool landscape with its own providers, fees and payout models. The detail pages show the live distribution for each coin - for example the Kaspa Mining Pools page. How pool earnings work out in concrete terms can be modelled in the Mining Calculator.