I just read were Google's algorithm changed 450 times last year. It was a quote from Matt Cutt's. That might explain some of this.
This is a discussion on Any time my rankings go up or down within the Google forums, part of the Search Engine and Directory category; [FONT=&quot]People’s thoughts: Any time my rankings go up or down, I should assume that it's the result of some change ...
[FONT="]People’s thoughts: Any time my rankings go up or down, I should assume that it's the result of some change I made. Even better, if my rankings drop I should assume that someone at Google manually looked at my site and penalized it.
FACT: It's nearly impossible to discern cause and effect in the search engines. Webmasters new to search rankings are usually quick to ascribe a change in position to some recent change on their site. Maybe that's accurate, but maybe it's not -- and I'm tempted to say that it's probably not. A change in position could be the result of a completely different change you made to your site three months ago that you forgot about. Or it could be the result of changes competitors made to their sites. Or it could be that the engines changed their algorithm and the changes on your site had nothing to do with it. In the end, it's nearly impossible to correlate changes on your site with changes to your ranking. So what's the strategy here? Simple: Don't worry about it. Focus on creating the best site you can: the general things, not the specific ones.
It's tempting to think that a change in your rankings was the result of some change you made, but it's just as likely to be coincidence. It could be the result of an algorithm change or competing sites doing things that caused them to rank better. Google doesn't have the resources or the inclination to police the billions and billions of pages on the Internet. Humans at the search engine are not personally monitoring your website; your website is not that important.
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I just read were Google's algorithm changed 450 times last year. It was a quote from Matt Cutt's. That might explain some of this.
It depends on many factors. For example quantity of your incoming links may be changed sometimes.
^^ can you share your views for this if you know anything about the algorithm ?
we can say it google dance and also from last two months, lots of site has got top and down position in SERP. i have also this problem for my site, but i have not found any solution for it. coz it is direct from google databases centers.
you can check your ranking on different GDC in order to know your exact position....without any surprise many competitors are working hard on Seo in order to rank on SE's that's why many changes occur in SERP...
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I believe that most chances are due to what data center your query lands at. Some is due also to competition.
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