FastStast Analyzer allows you to filter your requests by query strings. To set up a query string filter, enter the name of the query string variable, and the values you want to filter for. Both fields can take wildcards.
Query strings show up on your URL like this:
http://www.yourdomain.com/yourpage.cgi?variable=value&variable2=value2
or even
http://www.yourdomain.com/yourpage.html?variable=value&variable2=value2
Query strings pass information from the URL to the page that the visitor requests from your server. If your site uses server side scripting, your scripts can make use of this information in whatever way you want, even to alter the actual page appearance. However, you do not have to make use of the variables passed on the URL in server side scripting, since the variables also appear in your server log files. Analyzer can use the query string values to improve or drill down on analysis for particular marketing situations.
When you purchase keywords at a pay-per-click search site, it's always a good idea to put query string variables and values on the URL that the search engine will use to direct visitors to your site. Most search engines will also place the search phrase and keywords in variables in the URL for you, or other relevant information about the visitor's search. Analyzer includes the ability to track search engine keyword performance, but you may want to filter by the URL query string to get a view of a particular behavior for a specific search engine.
When you partner with some other site for link exchange, give them a URL that has a query string on it to use for a link. For example, you may want them to link like this: http://www.mysite.com/index.html?partner=sam%20q%20smith (note that %20 is equivalent to a space in a URL). That way, you can filter for this variable to see how many visitors "sam q smith" is sending you.