You Will See the Word Visitor Often in Your Platform Analytics, Here Is Why
When someone who isn't in your contacts visits your landing page, they will be marked as a "Visitor" until they fill out a form. After completing the form, the system will create a contact for that person and keep them as the person on your landing page.
You will see Visitors in your dashboard from your social media posts, website widgets, or if a subscriber forwards your email to another person.