Autotune is a clever tool that helps singers sound better when they are not able to sing perfectly in tune. It works like magic and fixes their pitch (which means how high or low their voice sounds) to make them sound like they are singing right on pitch. It is like a computer program that is able to read the pitch of the singer's voice and then adjust it to the right notes. It's like having a special helper who can make sure that a singer's voice always sounds perfect, even if they are not singing perfectly.
Autotune can be fun to use, but it can also be overused. If you use it too much, your voice can start to sound robotic and fake, so it's important to use it wisely!