How to Add Connected Data to the HTML Widget

Connected Data allows you to connect site widgets to data that is maintained in external sources and/or inside the site’s Content Library.
This enables you to have one source of truth to build websites more quickly, keep websites up-to-date and accurate, ensure site-wide consistency of important information, and more. When sites widgets are connected through Connected Data, you no longer need to manually change the data in each of the widgets as they are controlled through the Content Library.

For more information, check out this article:

https://support.duda.co/hc/en-us/articles/1500001598102-Connected-Data