What is the latest update in SEO?
 

Any update for Google panda.

No but i think mobile usability has become a crucial aspect if you want to get good ranks.also i have heard that google is using analytic data more than the backlink concept to rank pages, so if you have not verified your page in google analytic do it quickly, may be you are loosing rank because of that.

On April 21, 2015, Google had released a significant new mobile-friendly ranking algorithm that’s designed to give a boost to mobile-friendly pages in Google’s mobile search results.

Yes, there is no new update from Google after 21st april.