What type of web app should you design for customers to register for webinars without an Appian account?

The correct choice for allowing customers to register for webinars without needing an Appian account is to design a Portal. Portals in Appian are specifically designed for external users and provide them a way to interact with the application functionalities without requiring them to have an Appian account. This approach streamlines the registration process, making it accessible to a broader audience who may not have prior engagement with the Appian platform.

In this scenario, a Portal serves as a public-facing point where customers can access specific functionalities, such as webinar registration forms, display necessary information about the webinars, and receive confirmation of their registrations, all without the need for them to log in.

Choosing a Site or a Dashboard does not achieve the goal of customer registration for those without an account. While a Site can contain various components like forms and reports, it may imply the need for user accounts for certain functionalities. A Dashboard primarily focuses on analytics and data visualization, which would not be suitable for registration purposes. A Form is merely a component that gathers data; it would need to be embedded within a Portal or Site to function correctly for external users. Therefore, designing a Portal is the most suitable option to meet the requirement of allowing external users to register seamlessly.