What is the purpose of using a default filter in Appian?

The purpose of using a default filter in Appian is primarily to restrict data visibility. This type of filter allows developers to define specific criteria for what data should be returned when a view or report is generated, ensuring that users only see the information that is relevant to them based on the defined parameters. For instance, if a default filter is set, any user accessing a relevant report will only see data that meets the specified conditions, thereby enhancing security and privacy by limiting exposure to sensitive or irrelevant information.

Default filters are crucial in managing how data is presented to various user roles, as they can be tailored to suit different needs within an organization. By restricting the visibility of data, default filters help create a more focused and manageable user experience, making it easier for users to find and interact with the information pertinent to their tasks.

The other options do not correctly represent the primary function of default filters; they relate to different aspects of user management and system performance.