It's a literal translation, and can be used in several contexts:
* Figuratively: It can be used to describe something that feels like the end of the world, like a major breakup, a catastrophic event, or a personal crisis.
* Literally: It can refer to apocalyptic scenarios, the end of the Earth, or the end of a particular civilization.
* As a place name: "Fin del Mundo" is also the name of a location in Argentina, a peninsula at the southern tip of South America.
The meaning of "Fin del mundo" depends on the context in which it is used.