My sites traffic gone null but after Google recieve one dmca complain for my site. My site is a mp3 search engine so I can index copyright mp3 out of my knowledge. I recieved a message in webmasters tools in and I have removed the copyright content from my site but traffic from Google is not increasing. What is the problem? Do I need to tell Google that I have removed the copyright content from my site? If yes then why I have lost my site traffic from Google forever?