Cryptocurrency burning is when users or holders can remove tokens from circulation, and it's normally reduces the number of coin in use.

That's true about token burn, it's about removing some of the tokens from the circulation with the aim that it will help to increase the market value of the token.

The addresses that are used for the burning are known as dead or null or burner address, they don't have private keys and whatever that enters there belongs to nobody again because they are now destroyed permanently.