Contact Fields to Generate PURLs
The PURL is generated from your contact fields. By default, the PURL will use the contact's first and last name, which will give you...
domain.com/{first_name}.{last_name} → domain.com/Joe.Smith
You can also choose from any other contact fields to generate your PURLs. If your domain is using a Merged for Subdomain format, you can also choose to ignore the second field.
To update the contact fields used to generate the PURL, go to your Dashboard and select edit next the Campaign you would like to update. Scroll down to the PURL Fields section, and adjust there.