Google’s Search-based Keyword Tool
In addition to the Google AdWords keyword tool, which tells advertisers which keywords are most popularly used as search queries, Google not long ago introduced its Search-based Keyword Tool.
Search-based Keyword Tool operates the reverse way how Google serves pages based on a user’s search query. So instead of keyword inputs, Search-based Keyword Tool accepts web pages as input parameter and processes it (along with optional words or phrases) to display which keywords potential customers or visitors are using to reach your site.

In case you are logged in, you will be able to pick which websites to analyze from the “Website” field in the image above. Also, the tool will display the keywords that you haven’t used yet in your campaign. In other words, this tool will tell you what keywords you are potentially missing from your existing campaign.






