Info about URL queries and Persistent Values:
For all of the fields in your form, you’re going to add a default value which will be extracted from the parameter passed through the URL when you search.
For instance, the URL that holds the search form might look like this: https://yourwebsitename.com/search-links
When we push the submit button, it would look something like this: https://yourwebsitename.com/search-for-links?linktitle=Formidable
You see the question-mark just after the page name? That signifies that after it, a number of variable-value pairs will be sent to the page to be processed. In this case, only one variable – linktitle is being sent, and it’s value is Formidable.
When we want to extract values/parameters off a URL query in Formidable forms, we use the syntax [get param=variablename].
So in the case of linktitle, we use [get param = linktitle]