The changing face of Mobile Search and Google's mobile ranking updates
I think many of us make assumptions about mobile search, and not many of them turn out to be true. I know I have been. But mobile search, and mobile usage in general, has been changing quite fast over the last few years, and even sites that you wouldn't "traditionally" think of catering to mobile users can hugely benefit by thinking of mobile as equal-to if not greater-than their desktop traffic.+Stone Temple Consulting
's recent case study by +Eric Enge
looks at the data from a rankings perspective: https://www.stonetemple.com/what-was-the-impact-of-googles-second-mobile-update/
But I think it's also necessary for website owners to look at their traffic from a Device channel perspective. And even if a small percentage (say under 20%) are coming on mobile, I'd be inclined to encourage them to focus their efforts on this 20%. To think about how mobile visitors differ from desktop visitors, to make sure their user experience is ideal for those visitors, and to optimize their user interface to enable mobile visitors to accomplish their goals quicker and easier.
The image I've attached below is a client site, and we've broken out their organic search traffic into the three device groups (mobile, tablet, desktop).
Keep in mind that the site has been mobile-friendly the entire time.
While the entire site has performed really well over the last year in organic search, increasing from 9,500 organic search / mo to 18,000 organic search / mo,
mobile: 4200 -> 9800 (133% growth)
desktop: 3900 -> 6400 (64% growth)
As you can see, for this client (which I wouldn't consider a traditional mobile-targeted business), mobile has far outgrown desktop as the primary means of organic search traffic and a major segment of their overall inbound traffic.
Focus on mobile and those search-driven moments: http://www.confluentforms.com/2015/09/intent-micro-moments-and-meta-moments.html