On published pages and pages in designer mode, users with the page builder role can access the source module for a card.

Use this option to learn the location of your data and engage with the underlying data directly.

To edit cards, select Edit to open your page in designer mode.  

Select Save to save as a draft, or Publish to publish the page. 

To display the source module name, and then access the module for a card, hover over your card and select Card options , then select the module number under Source module.