Allow Guest Users to Access Flows
Where: This feature is available in Salesforce Tabs + Visualforce and Lightning communities accessed through Lightning Experience and Salesforce Classic, and is available in Enterprise, Performance, Unlimited, and Developer editions.
Why: Allowing guest users to access flows means you can serve up multi-part forms and decision trees aimed at gathering specific data before a user registers. Admins can register users at the end of the flow and pull in all previously entered information.
Guest user flows allow users to provide their preferences before creating an account. In this example, the admin wants to let users declare their data privacy preferences before creating an account. Using flows, the admin creates a screen to gather login information, such as name and email address.
When visitors enter basic information, they can move to the next screen, which asks about data collection preferences.
The visitor can continue to the last screen, which creates a user record and saves their preferences.