The difference between the two means that Desktop SEO will focus on the general public while mobile SEO can have more of a local focus. The difference is in the results you get ehn searching on mobile vs desktop.
Search engines are taking what device you are operating on to determine what search results to present. For mobile, search will be influenced on your location.
This means getting a good ranking for your product or content on desktop doesn’t guarantee the same result on mobile.
Tip: ensure you are always keeping an eye on the mobile search results.
Google is continuing it push for rich results and these are more prominent on mobile. We’ll be seeing more of this happening going forward. For example, think about searching for flights, events, music, products and simple facts will trigger a google-owned rich result.