Pop-up views, also known as modal dialogs or modal windows, are commonly used in software interfaces to display additional information or interact with the user while temporarily blocking interaction with the rest of the application. These views "pop up" on top of the main interface and typically require the user to interact with them before they can return to the main interface.

Here are some use cases for pop-up views:

1. Notifications: Pop-up views can be used to display notifications or alerts to the user, such as system updates, error messages, or important information that requires immediate attention. These views usually have a prominent visual appearance and may include buttons or links for the user to take action.
2. Forms and Input: Pop-up views are useful for presenting forms or input fields that require user interaction. For example, when creating a new item or editing existing information, a pop-up form can collect the necessary data without navigating away from the main interface.
3. Confirmations and Dialogs: Pop-up views are often used to present confirmation messages or dialogs for critical actions. These dialogs prompt the user to confirm or cancel an action before proceeding, helping prevent accidental or irreversible changes.
4. Contextual Information: Pop-up views can be employed to display contextual information related to a specific item or element on the main interface. For instance, hovering over an item may trigger a pop-up view that shows additional details or actions related to that item.
5. Media and Multimedia: Pop-up views are useful for displaying multimedia content like images, videos, or slideshows. These views can be modal, allowing the user to focus on the media content without distractions from the main interface.
6. Help and Documentation: Pop-up views can be used to provide help documentation, tooltips, or guided tours within the software. These views offer on-demand assistance to users, providing explanations or instructions related to the current context.

When designing pop-up views, it's essential to consider their purpose, user experience, and accessibility. They should be used effectively to avoid overwhelming the user with too many interruptions or obstructing the main interface. Additionally, providing clear instructions, easily dismissible options, and ensuring compatibility with assistive technologies are important factors to consider in creating effective and inclusive pop-up views.