What are these objects

I’ve noticed in recent release notes that roblox is adding weird new objects and I have no clue what they are used for.

CurveAnimation
RotationCurve
Vector3Curve
EulerRotationCurve
FloatCurve

I spent a while searching but couldn’t find anything at all on any of these. I looked at their functions in the object browser and all I can gather is something having to do with keys??

This isn’t really important but if anyone knows about them, I would like to hear.

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