How to tell whether a site is adaptive or responsive

As most SEOs are aware by now, there are three main techniques for serving mobile website content: responsive design, adaptive design (also called dynamic serving), and separate mobile URLs.
While it’s easy to identify separate mobile URLs just by looking at your browser’s address bar, telling responsive and adaptive sites apart can take a little more digging around.
In my mobile workshops with Shari Thurow at SMX West and SMX Advanced earlier this year, many of the participants were confused as to how to tell responsive and adaptive mobile configurations apart. So, I went through the exercise that I’m going to describe today. Hopefully, it will help some of you make the distinction.
If you’re not sure if the site you’re looking at is responsive or adaptive, ask yourself these questions:
Does it change shape when you resize your browser from a desktop computer?
Responsive sites are meant to change layout based on browser window size (regardless of device), while adaptive sites

Search Engine Land Source

How to Identify The Impact Of Mobilegeddon & Future Mobile Algorithm Updates

The new Google mobile algorithm has arrived in all its fury, and everyone seems a little disappointed in the change that failed to rival Panda.
Entire industries were not destroyed, and even if they were, former Google head of webspam Matt Cutts isn’t around to blame anymore.
According to Google Search Console ringleader John Mueller, this is due to the fact that, while the new mobile algorithm affected a lot of queries, most sites were either:

Already mobile friendly, or
Changed, but not significantly enough to notice (vs. Panda where the entire site dropped in search results).

In this column, I’ll explain how to get as close as possible to finding the cause of gain or loss of mobile clicks at the page and query level using Google Search Analytics. I’ll also attempt to establish a good benchmark based on the current strength of the new Google mobile algorithm.
Strength, Stats, & Spotting The New Google Mobile Algorithm
Enterprise SEO Tool BrightEdge tracked 20,000 non-mobile friendly URLs

Search Engine Land Source