Sometime between September 22 and November 17, 2005, Google launched a major update to its search algorithm, shaking up the search engine optimization (SEO) community—and millions of Web site rankings. The update has been named Jagger and is apparently finished.

The keywords that people used to find your site with in Google may not be producing as many visits any more, because the Jagger changes caused your rankings to plummet. Of course, many people have seen their rankings stay the same or improve in Jagger's aftermath, too.

If your site's rankings have decreased, what can be done to get back to where you were or better in the post-Jagger Google world?

There are still a lot of questions, to be sure, and not a lot of answers. But there are some good beginnings of answers. Since this update was rolled out over months and in three distinct phases, it has been much more difficult to determine what factors have been given more weight or less.

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