Can anyone update here or provide more documentation?
The way I understand it is this:
There are 3 elements in the Query String setup in Eloqua...
1. individual Query String Parameters-tracks 1 query string parameter across all pages in a domain.
2. Query String Parameter Sets- track one or more query string parameters as defined in number 1, but the exception is you are checking for very SPECIFIC pages, as opposed to all of them, and can check more than 1 parameter. It is useful when you want to look for multi-parameter query strings instead of just one parameter.
3. Query String Clusters-can check more than one parameter, but is not for specific pages, it is for all pages.
The only thing I am uncertain of is how this data looks in reporting. There is a display map where you can swap out submitted data for descriptive text when looking at reporting, but I am not certain what this means or the proper usage of this component. Does anyone have any insight?