My website is not mobile friendly. How to fix ?

Hi friend,

Im servicing lenovo service center in chennai. Now i got an error in website. Its not mobile friendly. so anyone help me to solve the error?

My website - lenovoservicecentreinchennai.com

Errors are
Page is not mobile friendly
This page can be difficult to use on a mobile device

-Clickable elements too close together
-Content wider than screen

Thanks
Lenovo Service Center in Chennai