Top 5 benefits of Rooting your phone

 1-Block ads in any app.

 2-you can change boot animations.

 3-you can fully backup your android.

 4-You Can Flash a Custom ROM.

 5-You can Overclock and Underclock the processor easily.

Remember: If someone stuck in rooting in his friend and the phone 
was not totally rooted so that is the end of your phone so be careful while rooting your phone.I am not responsible for any of your loss.

Rooting also has many disadvantages like does not give you warranty after the phone has been rooted.there are many risks for rooting android and the manufacturer will not responsible for any problem if the phone is being rooted.