Generally, rooting an Android will leave your phone highly vulnerable and provides a fairly wide open attack surface. Unless you know what you're doing and practice reasonable security hygiene, I'd leave it alone.
Rooting is the process of allowing users of smartphones, tablets and other devices running the Android operating system to attain privileged control. Thanks to it, you are getting the access to free apps and many more. And it's safe only if it has done by an expert. That's why it's better to apply to a good service like this one https://safe-root.com/root-lg-mobile-phone/