Google Search Based Keyword Features
The Google Search-Based Keyword Tool allows you to search keywords to get information on search volume, competition, and suggested bid by keyword, site or category. It generates keyword ideas specific and relevant to your website.
By entering a website URL, the results will display a list of actual queries that have been entered with some frequency on Google search properties over the past year. It organizes the keywords and phrases by category that you can click on to expand to see subcategories. The competition for the keywords is denoted by a bar that shows the saturation for each keyword.
The difference between this tool and the Adwords Keyword Tool is that this one generates ideas based on a website, not just a keyword entered. It also offers more detailed data, including category information, suggested bid price for top search positions, and ad/search share. You can limit the category for the search, or obtain data from all categories. If you have an Adwords account, this tool can help show you new opportunities you may otherwise miss.