can someone explain to me what CFrame.fromAxisAngle means?

I was learning about lerp to make a door, and so when i typed CFrame.Angles, CFrame.fromAxisAngle popped up and i thought it meant that you can rotate a object around a axle or something, so looked it up on wiki, but im not sure about it. Can someone explain what fromAxisAngles mean and what it does, bc i tried using it but it it didnt work.