I believe I was hit with a duplicate content penalty.
I just launched this website, all was going well, even reached 190 visitors / day in the first week. Then bam, now I get 60 visitors / day if I'm lucky. My stats plugin is showing 0 search terms from google itself. The website has almost 600k pages. The nature of the website is song lyrics so naturally there is more than one website out there that has lyrics and they don't change from website to website. Any ideas on how to mitigate this?
I looked up this supplemental google index thing and did a search for the site, the majority of the links are in this index. Also the website was loading slow for a few days due to maintenance, could this be an issue?