what does it mean to use god's name in vain

Using God's name in vain means using God's name in a disrespectful or irreverent way, which goes beyond just using it as a swear word. It involves any misuse that brings dishonor to God's character, such as lying while invoking God's name, making false oaths, blasphemy, or hypocritical behavior that misrepresents God. It also includes professing faith or calling oneself a Christian while deliberately disobeying God's commands or living in a way that contradicts the nature of God. This commandment calls for reverence of God's name, reflecting His holiness and glory, and warns that God will not hold guiltless those who misuse His name.