Linux Kernel is the core component of the Linux operating system. It handles low-level resource management and interacts with the hardware. Linux Kernel developers specialize in creating, maintaining, and improving the kernel's performance, stability, and security. They write code in programming languages such as C, C++, and Assembly to optimize the kernel's functionality and develop new features. Linux Kernel skills are essential for system administrators, software developers, and embedded systems engineers working with Linux-based systems.