How does Google decide if your site is mobile-friendly?

Google ranks mobile-friendly websites higher in search results because they think a mobile-optimized website is a better “answer” than a non-optimized site.

Responsive website for solar energy company

A modern, SEO-ready, mobile-optimized website designed to communicate its message and generate leads.

For crying out loud, make a mobile-friendly website already!

We still hear people saying their customers don’t use mobile enough to need a mobile-friendly website. How long will it be until the message to think about your mobile visitors FIRST sinks in?