Unoriented : isotropic : "the same in any direction" .
Itīs Alnico/Ceramic/whatever just poured out of the kiln or just sintered without any further action, can be magnetized equally in any direction which is sometimes necessary (complex multipole magnets for motors or sensors) but not "best performance".
Oriented : anisotropic : has a preferred axis of magnetization, can easily double performance compared to unoriented one.
Is made by applying a strong magnetic field while cooling or sintering, so all microscopic magnetic particles get oriented the same way.
It will not "stay" magnetized at that moment because temperatures involved are very high, but in normal use it will be both easier to magnetize and stronger afterwards.