ELI5: Explain Like I'm 5

Adaptive learning

Adaptive learning means that computers can learn from the things you do and then give you things to do that are easier or harder depending on what you already know.
It's like having a teacher who can tell when you're struggling with something, so they give you an easier version of the problem, or when you understand something, so they give you a more difficult problem. That way, it can help you learn more and get better more quickly.