Firmware is a small software program that controls your Cricut's electronics. Your Cricut needs firmware to function and to be able to understand software on your computer.
Firmware is specific to your particular Cricut model and is developed and improved by your Cricut's manufacturer.
I have written an overview of firmware that will help you understand it further and I encourage you to read it. Why? Because, even if you never use a computer with your Cricut, it is an electronic device and contolled by built-in software. The Cricut manufacturer improves the firmware as it discovers bugs or applies new techniques to improve your Cricut's performance.
I have step-by-step instructions that guide you through the process of updating your Cricut's firmware.