When you need to modify a URL to get a page rendered, you need to make sure that the URL has the correct parameters. It is a headache to remember what parameters you have to add, and what order you have to add them in. 

QueryParam allows you to add action buttons for a particular set of URL parameters. You can add a button for the first time you see the page, and it will appear in the list of action buttons. This is very convenient, and it allows you to have quick access to the page.

Now, you can create as many action buttons as you need, and you don't have to worry about adding them all manually.