This result shows the X, Y, or Z component of the thermal displacement (consider only cooling effect) after the part is ejected and cooled down to room temperature.
This result is called thermal displacement because it is an indicator of cooling balance. Unbalanced cooling will lead to un-uniform volumetric shrinkage and further cause warpage.
If the thermal displacement is too large, you should redesign the cooling system, such as modifying cooling channel layout or adjusting the mold temperature. Note that the result value is relative to the model coordinate.