First thing is that it significantly reduces the time wooden material needs to dry naturally.
This way already 2-3 weeks after the wood drying treatment the wood is ready for further processing. With wood drying done this way it is possible to turn completely fresh wood into a ready-to-use material in a very short time.
The second accompanying result of hydro-thermal processing of raw wood is stabilizing the internal tensions in the structure of every single piece of wood.
In other words, wood drying is done to extract the so-called bound water and structural humidity which reduces the future chance of cracking.