Hello !! Why Google ranking is so much fluctuate? is there some changes does by Google or it is effect of Google real penguin updates.

Every time Google changes its ranking algorithm, existing web pages may drop in the rankings, dropping them slowly or they may happen unexpectedly. Google has a special impact on your site.

It could be as a result of so many factors. Google could have updated their algorithm yes, but more likely in the short term your rankings on keywords will also be changing frequently depending on which websites internet users are visiting for those search terms. This could be affected by yours and your competitors content, SEO (both on page and off page), SMO etc. etc.

The lower you are in search rankings, the more volatility there will be. When you're at number one, you'll fluctuate some. You might drop to position two or three, and be back up to one in a day or two.

The following are the two reasons for keyword fluctuation. Google often updates the algorithm your website should meet google requirements if not there will be keyword fluctuation. And the second thing is that your backlinks may get deleted and that causes your keyword to fluctuate.