google update

Since last one week, my site's (adanipharma (.) com) some keywords are going down upto 60 to 70 position. Do you face this problem? Does anyone have any idea? What to do to get rank back?

This April 21 — Google will start to roll out big changes to the way they rank Web pages, as we all know … ;) :D Google said this update will significantly affect search results around the world in all supported languages, particularly for mobile searches … This shift to more...