Have you thought a responsive site is a must before going live? Well if not then you failed in the era of mobile world to attract the mobile user. Whenever you made a website try to make it responsive so that the user experience will be good enough and increase the usability which will also boost the traffic to your website.
some guideline you need to follow:
Minimum page loading time
Hoisting cost and performance
Content should be good
follow this effort will help to acquire a more mobile user and help to increase your business via multiple devices.
If you have any advice just tell...........................