One meaning of obscurity is nobody knowing who you are, and another definition is something that is hard to understand because it’s too complex or unclear.
Obscurity is the opposite of fame, and living in obscurity means that nobody knows your name. Many musicians played in obscurity for years before becoming rock stars. The Latin obscurus means “dark,” which is where obscurity is found: in the dark where no one sees it. Something difficult to comprehend has obscurity, for example the obscurity of a medical magazine, or a complex poem that is full of literary obscurities, referencing other poems that no one has read.