Mobile Usability

Often referred to as “Mobilegeddon”, an update rewards pages properly optimized for mobile devices.

With more than half of all searches done from mobile devices, Google wants to see that your site is optimized for mobile users. Google now penalizes websites that aren't mobile-friendly.

Websites that mobile users can easily use may have an edge in Google's “Mobile-first Index”.

While not a direct Google ranking factor, AMP (Accelerated Mobile Pages) may be a requirement to rank in the mobile version of the Google News Carousel.

Hidden content on mobile devices may not get indexed nor weighed as heavily as fully visible content. However, a Googler recently stated that hidden content is OK, but “...if it's critical content it should be visible...”.