Why Kernel is so important for you Device

In this video i discussed that what is kernel? what are the roles and functions of Kernel?
Linux kernel
Android development
Kernel (Software)
operating system
operating, software, Windows, Android (operating System)
kernel, android power user, Computer
Tutorial, Linux, Desktop, Phone, smartphone
development, firmware, custom, franco, how to flash
what is a kernel
what is kernel
how to flash kernel
how kernel works