Hello Guys,
How can I get my dropped ranking back on google? or Where can I find the reason behind that?
Thnks.
Hi etrackmedia. 
We can’t possibly know what’s happened in your situation. All you can do it make sure to tick all the SEO marketing boxes and undo any mistakes. Here’s an FAQ on the basics of SEO: http://www.sitepoint.com/forums/showthread.php?182915-FAQ-Search-Engine-Optimization