I love the Power BI card visual. I would say that most of my dashboards have at least one of these included somewhere in it. However there is one annoying issue with this visual. If the value shown on the card visual returns a measure that has no value then the card visual displays the word '(Blank)'.
This looks rubbish and also can be confusing for the reader. In this video I'll cover 3 approaches you can use to fix this issue and ensure a more appropriate value is displayed.