How to Interpret This Tx on

I got lost in reading this transaction:
a tx from

This transaction does not have an input address, instead, it says "COINBASE (Newly Generated Coins)". Is it a block reward to the miner? But the amount does not add up, since it is 6.71380828 BTC rather than 6.25. And what does OP_RETURN 0 BTC mean? Is it in case a fork happened and the transaction got revoked? Can anybody help me out in reading this transaction? Thanks a lot!