Here are some examples of how to use "estupendo":
* "¡Estupendo! Me encanta este vestido." (Excellent! I love this dress.)
* "La comida está estupenda." (The food is fantastic.)
* "Tu trabajo es estupendo." (Your work is brilliant.)
* "¡Qué estupenda idea!" (What a wonderful idea!)
It's a very versatile word that can be used in many situations.