LoopForge
Does this replace keyframe animation?
Nope! Loop Forge is for procedural, repeating, ambient motion ---- floating, spinning, pulsing, bouncing, rippling. For character performance and storytelling, you still want keyframes. Plenty of people use both in the same scene.
Do I need to know how to animate?
No. That's the entire point. If you can select an object and click a button, you can use Loop Forge. There's no graph editor, no keyframes, and no timeline work required.