Mining profit is the profit obtained by mining cryptocurrency. Mining profit is generally consisted of two parts, including block reward for the block out (in April 2018, bitcoin block reward is 12.5 BTC) and mining/transaction fee.
Generally speaking, mining profit will be settled between mining pool and miners. When miners use the mining pool, they choose different payment methods (mainly including PPS, PPLNS, PPS+, FPPS), and the amount of mining profit they receive will also be different.
Note: Poolin mining pool page shows the mining profit according to mining date, rather than showing the mining profit based on the date of payment.
The following picture is an example. The screenshot of this picture was made on November 20, 2019. And the mining profit paid on November 20, 2019 was the actual profit of the mining on November 19, 2019. Therefore, the latest bills that can be seen every day are actual mining profit of yesterday.