How does blocking work in Magic: The Gathering?

In Magic: The Gathering, blocking is when a player chooses one or more of their creatures to defend against an attacking creature. The attacking creature deals damage to the defending creature(s), and vice versa. If the attacking creature's power is greater than the defending creature's toughness, the defending creature is destroyed. Blocking is a strategic element of the game that can help protect your life points and control the battlefield.