Oh, okay. Not sure if you want an explanation, but it’s here if you want!

The kernel is kind of the part of the operating system that glues everything together. It provides common interfaces for accessing hardware, provides a library of useful functions to programs, and manages running all of your programs at the same time (like, you know how you can have more programs running than you have CPU cores? The kernel is responsible for scheduling when each program gets to execute instructions on the CPU and stuff).

A binary blob is just what we call it when some piece of software (in this case a driver), is only available in the executable binary format. No source code available, so it’s effectively a black box unless you make a substantial effort to reverse engineer it.

An API is an “application programming interface” which is more or less just a library of functions to do stuff. So if the interface for graphics drivers to talk to the kernel changes or something the old binary version of the driver may not work with newer kernel, and because it’s a binary blob nobody can update it except Nvidia.