Currently I am working on a affiliate site for home appliances. I am continuously adding unique content to it. Creating web 2.0 properties manually, a lot of unique youtube videos to backlink it. Everything is unique and manual. It was on first page of Google for its main keyword and it was also performing very well for some keywords which I never targeted. Everything was fine till yesterday. Today I got up and saw, my site is not in top 100 for a single keyword. What the fuck is this? I worked very hard on the site. It started to show result in last few days and now BOOM. Its gone. Not a single spammy link I created. What you think guys? What can be the reasons? Is there any update in Google algo yesterday???