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Does Google filter out certain words while in the sandbox? That's fine with me, I do not mind spending the time building valuable content and links as I have done with all of my websites.
This has not happened to me before. Has this happen to anyone else?
Google are certainly filtering words out of the keyword tool in Webmaster Tools that are definitely used for ranking. Like any of these tools, you need to be careful how you interpret the data. And of course, it doesn't matter at all if their tool doesn't display these words - they're still used when actually evaluating your site in organic results.
See the post below for related discussions:
New - Keyword "Significance" in Webmaster Tools