Good day what is "burn from function" in smart contract means

Good day i saw this smart contract

0x0496CcD13c9848f9c7d1507D1dd86a360B51b596

What is the use of the "burn from" function in the code.

burnFrom allows the caller to burn a certain amount of tokens on the owner's behalf given he's already approved of allowance. This can be useful in staking and unstaking scenarios when tokens are forfeited to exchange for other tokens.