A Tableau Packaged Workbook (.twbx) is a file format used by Tableau, a popular data visualization and business intelligence software. It's essentially a compressed archive that contains a Tableau workbook (.twb) along with all the supporting data sources (e.g., Excel files, CSV files, database extracts, images) required to open and interact with the workbook. This makes it easy to share workbooks with others, even if they don't have access to the original data sources. When a .twbx file is opened, Tableau automatically extracts the workbook and its associated data into a temporary directory, allowing the user to view and interact with the visualizations. This self-contained nature of the .twbx format ensures that the workbook functions correctly regardless of the recipient's environment. It's a crucial format for collaboration and distribution of Tableau dashboards and reports, ensuring data integrity and accessibility. The packaged workbook also preserves the data connections and any custom settings applied within the workbook, making it a reliable way to share complex data visualizations.