Keywords are one of the most important factors for generating adsense revenue.
Word Stream keyword tools provide visitors to your website now can perform the same keywordresearch and keyword organization.
It is available in two categories.
WordStream for PPC
WordStream for SEO
To create custom versions of the Word Stream keyword tools that you can embed on your own website, go to: http://www.wordstream.com/free-tool-widget-generator/ and follow the four-step process to obtain your embed code.