Ark and I has been experimenting SEO in the past few days. He has been sharing a lot of his knowledge pertaining to SEO. In his first optimized keyword about faceboook was facebok which is now at first page of Google search result. He gave me a keyword to also work out on which was facbook (hope would stay quite long at Google SERP). Now, I'm experimenting again the keyword faceboook.
If you think you're lost or looking for the most popular social network nowadays you visit the official site of Facebook here.