There are some people who downplay Google's Keyword Tool, claiming it to be useful and accurate only for adwords, and not SEO. Here's an article: hxxp://smackdown.blogsblogsblogs.com/2008/07/15/why-the-google-keyword-tool-is-useless-for-seo-even-with-exact-numbers/ Another good discussion (I know it's from Warrior Forum but the discussion looks useful): hxxp://www.warriorforum.com/adsense-ppc-seo-discussion-forum/21175-warriors-beware-google-keyword-tool-apparently-not-so-good-search-engine-optimization.html Personally, I stick to Wordtracker and this SEO Book Tool for keyword research: hxxp://tools.seobook.com/keyword-tools/seobook/ However, when I use the above tools in conjunction with the Google Trends Tool and the keyword Tool, the results are always so different. Sometimes Wordtracker will report 200 hits for the keyword daily, yet when I look at Google's tools, they say otherwise. Google's Trend and Keyword Tool may even tell you that there is not enough data to report on the traffic! So my question is, which tool should we trust? It's obvious that they all report different stats.