What is root (definition you should know)
Root is the user name or account that by default has access to all commands and files on a Linux or other Unix-like operating system. It is also referred to as the root account, root user and the superuser.
It's bit risky while you try your phone to root. It can soft brick (which can be fixed easily with proper knowledge) but other side of the coin has lots of possibilities and advantages.
For example you can customize phone performance by using apps like setcpu, greenify.
You can take full backups of your phone. By using app like nandroid.
You can breach into system files to know every possible thing.
We'll write more about it later.