It's a common expression used to express approval, agreement, or satisfaction with something.
Here are some examples:
* "Que bien te ves hoy!" (You look great today!)
* "Que bien que te guste la comida." (That's good that you like the food.)
* "Que bien que hayas venido." (It's good that you came.)
It can be used in a variety of contexts and often carries a positive and encouraging tone.