To illustrate how progressive disclosure works, let's look at some examples of web forms that use it. Airbnb's booking form uses tabs to display different steps, such as dates, guests, and payment. These tabs only show fields and options that are relevant to that step, with a summary and price on the right side. Additionally, users have the option to click on "More filters" to see additional criteria for their search. Mailchimp's signup form uses a button to reveal more fields, such as company name, website, and address. These fields are optional and not necessary for creating an account, so they are hidden by default. Furthermore, users can click on "Show password" to see what they have typed in the password field or on "What's this?" to view an explanation of the terms of use and privacy policy. Finally, Google Forms' form builder uses sliders to show more settings, such as adding a description or changing the color. Again, these settings are not essential for creating a form and are hidden by default. Users can also click on the question mark icon to find more help and tips for each field or option.