So, I'm still fairly new to ETH mining and I have recently heard about something called Block Rewards. I have read a bit on them via Googling, basically sounds like at some point, a miner can actually be rewarded a few full ETHs? Is this correct?

If so, how are these Block Rewards actually earned as I have been mining within a pool for over a month and haven't seen anything like this happen yet.

Can someone give me a clear and simple explanation of what ETH Block Rewards are and how they are obtained please?

Thanks much guys!