may be you lacked with Google panda update, while you build the backlinks may be chances to use duplicate content. now Google will wont accept the duplicate content.
I am working on two websites quality-web-solutions and quality-web-programming for last 1 year and suddenly I faced a problem lack of visitors. Though my rankings in major search engine are same. Off page optimization work is on. But sudden decrease in visitors giving me a lot of tension. We have recently done SMO where we have created our Facebook page. With a custom design. Our blog is doing great. The major lack is on our website.
may be you lacked with Google panda update, while you build the backlinks may be chances to use duplicate content. now Google will wont accept the duplicate content.
Social media sites can help you a lot in this scenario because billions of people are there on social media sites so it is right place to get visitors.
May be your website traffic down by the google panda and google penguin update. If you your traffic down regularly you have to focus on social Media websites like facebook, pinterest, google + etc and refresh your all content as soon as possible.
Marc Berry