Every PS3 game has a unique Title ID used to identify its region and format.
The string looks like a jumbled mess of characters, but for enthusiasts of the PlayStation 3 homebrew and emulation scene, it is a very specific "coordinates" tag. It refers to a digital version of WWE 2K16 (NPUB31743), a specific "fix" file (dmfix), and an update (upd). wwe2k16digital01npub31743dmfix upd