I have an article blog that has close to 100 articles. Started it almost a year ago. All articles are useful unique content. The site is 100% credible, has over 7k twitter followers and a good facebook following as well. Articles are good content as they are often retweeted and 'liked' on facebook, are commented on, etc. Basically I was building an authority site ranking for tons of different keywords. Wasn't doing any kind of spammy back linking, just being a contributing forum member in my niche and doing some guest blog posts, that's it.
Here is what happened last month (march 13th). This is a graph of my Google search traffic:
So I have no idea what happened. This was a few days before the panda update, but I don't understand as my site has been through every update in the past and only got more traffic. So now I am very very confused, and don't know what to do. The only thing I can think of is that some (not all) of my articles have some amazon affiliate links, but plenty of sites rank fine with amazon links. So I have no idea! Another thought is I recently started using Rank Tracker (by SEO Powersuite) to track keywords, so maybe that had an effect?! All I know is that pretty much all of my rankings (for many low comp keywords as well) went down resulting in losing 80% of my google search traffic.
What do you guys think could have happened?