Low-level graphics APIs are programming interfaces that provide developers with direct control over hardware resources for rendering graphics. They allow for fine-tuned performance and optimization by enabling access to the graphics processing unit (GPU) and its capabilities. Examples of low-level graphics APIs include Vulkan, Direct3D, and OpenGL. These APIs are designed for experienced developers who need to manage complex rendering tasks and resource allocation. By using low-level graphics APIs, developers can achieve higher performance and more detailed graphics in applications such as video games and simulations, but they often require a deeper understanding of computer graphics principles.