i was first page in Google i was building back links i checked keywords went to 10 Google page what hell happened i'm so lost don't know what to do now i'm start making back links they don't move from their placed did i got Google dance or penalty how can i find out ??? please help thanks
There could be many reasons for this from plagiarized content to untrusted back links or a badly done on page work. You need to analyze your stats if you have setup that. Check in your google webmaster tools for any messages from google regarding any violation or hacking. Without knowing what exactly has done previously and what was on the go on your website it is really hard for anyone to say what exactly the problem is. If your site was hacked and has some untrusted code on it remove it and request for the reconsideration or check your back link, fetch as googlebot, html issues in google webmaster and act accordingly to deal with the situation.