DIGRF v3 stands for Digital Interface for Graphics and Radio Frequencies version 3. Think of it like a language that electronic devices use to talk to each other.
Have you ever played a game on your tablet or watched a video on your phone? When you did that, the screen showed moving pictures, right? Those pictures are made up of tiny dots called pixels. Your device uses tiny parts called processors to tell those pixels what to do, like sparkle or move or disappear.
DIGRF v3 is a special way for the processor inside your device to talk to the screen and the radio. The radio is what makes it possible for your device to connect to the internet, make a call, or send a message. It's like a magic beanstalk that reaches up to the sky and connects to other devices far away.
So, let's say you want to watch a video on your phone while you're connected to the internet. Your device uses DIGRF v3 to tell the screen what to show on each pixel, and it uses DIGRF v3 to tell the radio to ask the internet to send the video to your device. And when you're done, DIGRF v3 helps your device send a message back to the internet saying "thank you" for the video so you can have another turn!
Without DIGRF v3, your device wouldn't know how to talk to the screen or the radio properly. But because it does, you get to play games, watch videos, and talk to your friends all the time!