my name's Mal Darwen, and I work for Wordtracker Customer Services. I hope the following is of some use to you:
Google's Adwords tool can be a useful addition to the SEO's toolkit, although it does seem to be more geared towards the PPC market. However, the number of results returned by Google is 200 while with Wordtracker, users get and can download up to 1000 keywords.
We feel that Google is using this new tool to generate new Adwords accounts
from where it makes its money. Wordtracker provides an independent keyword
research service on a subscription basis – we do not make money from each
keyword result that people might build on.
While Google reports impressive search volumes, there are a number of
• The figures Google provides are not actual searches but approximations. Like WT, Google takes a small sample and extrapolates an estimate from that. From our research that sample appears small but we’re still investigating.
• The default search position is ‘broad match’. This highly inflates the search estimates for a particular keyword.
Here is Google’s definition:
Broad Match - This is the default option. If you include general keyword or keyword phrases (such as tennis shoes) in your keyword list, your ads may appear when users search for tennis and shoes, in any order, and possibly along with other terms. For example, your ad may appear for the queries buy tennis shoes and tennis sneakers but not tennis players. Your ads may also be displayed on relevant variations of your keyword phrases and plurals, as
well as some related keywords and phrases via our expanded keyword matching technology.
Broad matches are often less targeted than exact or phrase matches.
• The estimates returned by Google also contain searches from Google’s content network. That’s the wide range of sites that publish Google ads.
• Google are also reporting monthly estimates while Wordtracker provides daily estimates.
This means that on first examination the Google counts will seem much higher than WT.
Wordtracker has always been completely open about where we get our data from. We take our information from two metacrawlers, Dogpile.com and Metacrawler.com. People use such search engines to search Google, MSN and Yahoo at the same time and as such provides very clean bot-free data. We get daily records which represents approximately just under 1% of daily searches across all search engines.
As I say, I hope this makes things a little clearer.
[edited by: buckworks at 7:49 pm (utc) on May 28, 2009]
[edit reason] removed email solictation [/edit]