I have 20 addon sites.Two sites was top 6th position of their keywords for 6 months.But within 1 day they drooped to 34 an 84 position.I could not understand what happen.one site was position 1 and it dropped to 2.All sites dropped.What may be the probable reason for drooping? Any suggestion or instruction -------- so that I can overcame this problem. I am creating links continuously.
it happens when you stop the activity on seo or do some unethical seo tactics... start doing the seo from the scratch and get the best result in google what you are expecting... there is not shortcut to get the ranking back in short time....
You need to tell us more about the seo activities that you are doing for the sites. Then only we would be able to tell if you are moving in the wrong direction or not. Content has also become important nowadays and you need to look whether there is duplicate on your site or not, that could be a reason (check - google panda update).
Sounds like the search engine penalised you... Got any paid links? Rely on article submission? Directory submission? Dupe content? Like SEOpro2011 says, look at the panda update
It seems you are also victim of Google farmer algorithm, change the content of your home page, and be more specific about your niche... so some SEO and you will return back to your previous positions...
34 to 84 is not a big drop. Your site may be just attaining the consistency before getting the right SERP. The results fluctuate and stops at the place where it is required to be. Get more results by SEO.