Google ranking fluctuation
If you own a website and if you are concerned about your website ranking (SERP) then, you must have seen your site’s rank fluctuating very often. This happen to me quite often and when I first observe the fluctuations, I was worried if that was happening to my site alone. But after reading many forum discussions and after discussing the topic with many experienced webmasters, I realized that, the fluctuation in Google SERP is very common.
In fact, Google does it deliberately in order to keep the SERP with fresh content every time some comes back and search a keyword again. There might be some specific Google algorithm, integrated in their Rage Rank algorithm which is driving all these fluctuations. But when it happens, it really pushes down a lot of sales and leads. But you should not worry much as Google usually reinstates your rank again in a due course of time. So, the best thing you can do is, wait and watch.