At this moment, I don’t want to speculate on the effects or penalties, in terms of search rankings, it would impose on a site. We will obviously know about it in the near future. However, Google insists that you double-check your site(s) to confirm that every page is fit for displaying on a small device, such as a smart phone.
Take the First Step
To ensure that your site is mobile-friendly, you can test it using a test tool designed by Google.
Here, check this link.
Hope you see this result…
Simplest Way to Make Images Responsive using CSS
Make Site Responsive
After testing the site with the above-mentioned tool, if you don’t see the awesome message, this indicates that your site may not be mobile-friendly. Please check every page on your site.
In-addition, you can do a detail check on your site using this Google link, as it will guide you to make a responsive site.
Right now, you need to focus on making your site responsive, in other words mobile-friendly. A Responsive web design is a layout that fits in any small device, such as, a smart phone, a tab etc. You will have to make necessary changes to your CSS files to make a responsive layout. In-addition, you might have to make changes to the HTML files too.
You will need the expertise of a Web Developer at this moment.
Good Luck!