A dashboard filter is a feature that allows users to filter dashboard components by one or more field values without changing the underlying report data. For example, a dashboard filter can allow users to view cases by origin, status, or owner. A dashboard filter consists of a filter name, one or more source fields, and one or more filter values. Users can apply one or more filters to see different views of the dashboard data. Reference: https://help.salesforce.com/s/articleView?id=sf.dashboards_filters.htm&type=5