Do you have any nicknames? Like say for example your name is Elizabeth Jane Smith, then you might go by ‘Beth’ or ‘Liz’ most of the time; that’s a nickname. If you’re good at scoring goals in soccer, maybe another nickname would be “Thunder Feet”!
God has different names too, like Jehovah-Jireh, which means “The Lord Will Provide”, or Jehovah-Shalom, “The Lord Our Peace”. Those are kinda like nicknames, but God’s personal name is "Yahweh".
It means He’s always existed, and always will; He doesn’t depend on anything to keep existing. You know how humans need food and water and shelter to keep living? God doesn’t need anything like that.
Learn more about God’s name Yahweh: