To understand what BTC mining is, we must first understand BTC, a representative cryptocurrency created in 2008. Now, a whole set of algorithmic systems surrounding its overall economic model has been established. The algorithm stipulates that BTC is obtained through a mathematical calculation, or "mining", as we call it in a more vivid fashion.
Many more cryptocurrencies, not just BTC, can be obtained through mining, but BTC is the very first application of mining to obtain cryptocurrencies around the world. The machines used for mining are generally computers. Through special mining computers, miners get accurate answers as fast as they could to obtain cryptocurrency rewards, which could then be used to obtain additional income through trading on the market.