Track panelist signup source
By default, where panelists signed up from, or by what means where they added as a panelist, is associated with the Source panel property.
To see how, or where from, the panelist was added to your company's pool of panelists, go to Panel > Panelists. Then, look under the Source column.
If you aim to track the signups on a more targeted level, e.g., know the social media platform where the signup originated, etc., you can add a Hidden Value element on your screener or signup form. Then, make the needed configurations on its Default Value and the screener's link. More information can be found in the Merge Codes section of our Hidden Values guide.