What does `'your_user'@'%'` mean in the `GRANT` statement, and how does it affect user creation and privileges?

'your_user'@'%' represents the username ('your_user') and the host from which the user can connect ('%'). '%' means the user can connect from any host. It's crucial to specify the correct host to limit access and enhance security. Incorrect host specification can lead to unexpected behavior or security vulnerabilities.