Bitcoin mining is the process of adding transaction records to Bitcoin's public ledger of past transactions. This ledger of past transactions is called the block chain as it is a chain of blocks. The block chain serves to confirm transactions to the rest of the network as having taken place.
www.weusecoins.com/en/mining-guide/Mining will give you reward for confirm new transaction and amount of reward depend on coin it self. Mining method have 2 Type, proof of work and proof of stake
Proof of work will need a hardware such as GPU, ASIC, or CPU. Low end hardware miner wont give you profit, profit calculated using cost of hardware, electricity, difficulty and coin price
Proof of stake not need hardware miner, usually you just need a PC and keep it online 24xHour x 30 days, so you will get a reward from staking. You can mine using low PC hardware for POS method. You need to select coin to stake and then keep it on your wallet online everyday
