Here's The Benifts -:
1) Your Phone Will Be Run More Smooth and Faster [By Increasing Ram With Root Access]
2) Your Phone Will Support New Custom Roms [After Root Access]
3) You Can Uninstall Any System app [By Root Browser app or another by root access]
4) You Can Move Any App As System app [By Root Access]
5) You Can Loot any app [By Imei, android id, changer With Root access]
Disadvantage of Rooting -:
1) Warranty Will Be No More[After Rooting]
2) If You Done Anything Wrong [Your phone Will Be Brick]
How to Root Without Pc Working way-:
1) Download Kingroot apk
2) Go To Phone Setting >> Build Number Click 5-10 Times
3) Go Back To Setting >>Developer Option >> Enable Usb
4) Now Open Kingroot
5) Click On Try It
6) In Few Minutes Your Phone Will Be Rooted Successfully