A Block Reward (also known as a Mining reward) is the compensation that is paid out by the internal incentive mechanism in order to keep nodes/miners interested enough to continue operating on any given blockchain.
A Reward is typically paid out in the form of newly minted/ newly generated cryptocurrency of a network. Rewards are only paid out to users who participate in a network’s consensus mechanism.
For example:
The block reward for mining the bitcoin block is 12.5 bitcoin every 10 minutes.
The block reward for mining the next Ravencoin block is 5,000 every 1 minute.