As you might know, Google has several ranking filters. Known are the -20, -25 filter, -30 filter, -100 filter, and the -950. Yahoo! does the same thing, but different filter ranges.

Webmasters are reporting that their rankings have dropped for some searches from a position two to a position six.

Have anyone been affected?

And what the is that filter about? Does it have to do with on-page or off-page factors?

Your contribution to this topic would be very appreciated.

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