Vulkan targets high-performance real-time 3D-graphics applications, such as video games and interactive media, and highly parallelized computing. Vulkan is intended to offer higher performance and more efficient CPU and GPU usage compared to the older OpenGL and Direct3D 11 APIs.
With a simpler, thinner driver and efficient CPU multi-threading capabilities, Vulkan has less latency and overhead than alternatives, such as OpenGL or older versions of Direct3D. If you use Vulkan, NVIDIA GPUs are a no-brainer.