Motion buffer range
Motion buffer range is a range that prevent unit targeted abilities from canceling when the target moves out of cast range during cast time. Default motion buffer range is 250. Few abilities have different values.
Abilities with different range
Items with buffer range
Although items do not have cast time or have 0 cast time, a few items have 250 buffer range to make them castable within default cast range + buffer range. But if the target is out of this range, it will be cast until the target move inside default range.