You can pass source codes from an action onto the thank you page redirect link. This is especially helpful if you use ActBlue fundraising pages as your redirect. When someone takes action on your Action Network form, the source code they use will automatically be passed through to the thank you redirect page.
You can set this up on the 'thank you page redirect' section of the 'responses' tab of your action manage page. Insert the link you would like to redirect to. You can use any key in the argument (like refcode, if you're using ActBlue). More on keys and URL argument structure here. Then set the value as {{ source }}
For example:
If the redirect link is: https://myurl.com?mytrackingkey={{ source }}
And the action link is https://actionnetwork.org/forms/myform?source=mysourceiscool
Then the redirect would be https://myurl.com?mytrackingkey=mysourceiscool
Note: This URL argument only works when sharing links over email, not via social media, your website, or anything else.
Note: This can be used in conjunction with the URL-based redirects.