If you are contemplating re-designing your website in order to make it responsive or mobile friendly for the tablet/phone users, Google has given you all the more reason to consider it seriously.
Google has officially released this update on google plus in the post below:
According to a post published by SEJ, the parameters that determine your site’s mobile friendliness are:
It is recommended that you test your page using pagespeed insights tool to find out more site specific recommendations.
Where do I check if my existing site is mobile friendly?
Google provides you with a tool to check your page for it’s mobile friendlyness here: https://www.google.com/…/mobile-friendly/
A successful test looks something like this:
You can also improve your mobile friendliness score using the pagespeed insights.
As you will notice, this page shows you a bunch of improvements that you can make to your web page in order to make it more friendly for a mobile user.