Measure the online-commercial-intention, see if it’s worth advertsing.
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**Here’s a Great Tip
I would like to give you a ‘small tip’ that may help you save
money and better manage your investment for your pay per
click campaigns with AdWords, Yahoo, MSN, etc…
Microsoft has a free tool that can help you better determine
the commercial intention of a given keyword, set of keywords,
or Keyword phrase -and- it can help you decide which of
your keywords may be just wasting your advertising dollars
and which one will payoff -BEFORE- you invest any money
in them.
This tool is ‘G-worthy!’ – That mean ‘Garrett-worthy’ or
highly approved of by me. 
)
The tool is located at the Microsoft adCenter Labs website.
To use it, just enter your keyword and push the button.
They recommend anything over ‘.5′, as representing a ‘good
commercial intent keyword to use for your PPC campaigns’.
You can use the tool by going here:
==> http://adlab.msn.com/Online-Commercial-Intention/Default.aspx
I hope this tool helps you as it has helped me…
…to save money 
Have a great day and take care.
- Garrett
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