Never underestimate your own website potential  before deciding to pay fat $$$$$ to Google. There is a lots of work required behind the facade of your website to make sure it's not only looking great but also serves your business well. 
There has been said a lot in this matter in the past. You can find more here 
We are ready for questions!

Most of your website visitors will enter your digital space through search engines referrals. Also, they will visit 2-3 pages of your content before they leave. In other words they will click two to three times. We make sure that our clients webspace navigation works in their favour. The two-click rule has important implications for how we think about content and information architecture for corporate websites.

From that date, if your website is not optimized for mobile devices, it will appear further down searches made on mobile devices.
Based on analytics data, it's safe to assume that nearly a half of your traffic comes from mobile devices, so that’s a lot of traffic that you could be about to lose.
The simplest way to check if Google considers your site optimized or not (for they are the ones that decide...) is to respond to us.  
And its free! 

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