The amount of cryptocurrency credited to a miner's account after the miner successfully adds a block of transactions to the blockchain. The block reward includes the fees paid by the initiators of the transactions and the block subsidy.
The subsidy is the amount of newly generated coins based on the cryptocurrency algorithm in use. For example, the Bitcoin block subsidy began with 50 BTC per block and cuts in half every 210,000 blocks, which is roughly every four years. Designed to end in 2140, it becomes more difficult to reap monetary benefit from the reward as time passes. After 2140, a miner's reward will be derived only from transaction fees. See Bitcoin mining