What is the meaning of Thunderstruck?

Could you please clarify the significance of the term 'Thunderstruck'? It seems to be a phrase that carries a certain weight, yet I'm unsure of its exact meaning or context. Is it a metaphorical expression used to describe a feeling of profound shock or awe? Or perhaps it has a more specific meaning within a particular industry or culture? I'm intrigued to learn more about its origins and how it's commonly used.