Save your Work as .twbx.

Its preferred to save file in .twbx so that, its zips the file along with some data. and when shared with other help them to open hassle free. And the same time you should be aware of security measures whom to send the twbx file and twb file.

After you have created all the desired views of your data, you should save the results in a Tableau Workbook. Saving a Tableau workbook allows you to save all your worksheets for later use. It also allows you to share your results using a convenient file. Follow the steps below to save your workbook.

1. Select File > Save or press Ctrl + S on your keyboard.
   
2. Browse to a file location to save the workbook.
   By default, Tableau saves workbooks in the Workbooks directory in your Tableau Repository.
3. Specify a file name for the workbook.
   
4. Specify a file type. You can select from the following options:
   Tableau Workbook (.twb) – Saves the all the sheets and their connection information in a workbook file. The data is not included.
   Tableau Packaged Workbook (.twbx) – Saves all the sheets, their connection information and any local resources (e.g., local file data sources, background images, custom geocoding, etc.).
   
5. When finished, click Save.