It appears to be incoming search terms for a webstie that has the ExtremeTracking service installed. So it's not really that it's public, it's more that the incoming search terms are just saved along with personal identifying information (ISP/IP) etc.
Website states: "Adding the tracker to your site is not complicated. If you are familiar with HTML-editing just copy and paste the tracker code into the source of your pages and you are ready. The tracker code can also be handled fine with WYSIWYG editors and content management systems, scripts and blogs. You can use one and the same code for all your pages or the more advanced code to report groups of pages, it is all possible. We will be happy to help you through. At your My Account you find all your tracker details and setup instructions clearly explained as well as your personal code-checker to check if you have copied your code correctly."