meaning of "animateable" attribute in smproperty

Could anyone please explain the meaning of “animateable” attribute in smproperty definition? When it should be used?

Thank you in advance for any help

If a property is animatable, it can be added to an animation track in the animation view, and the track can modify the property’s values, e.g., sweeping across a range of isovalues to produce an animation of contour evolution.

Thank you Cory.
And what about “repeatable”

If repeatable, a property can have 1 or more values of the same kind.