A title that is given by a Regent to display a governmental assignment.
As such, the title is granted for role playing purposes and it is up to the regent or chancellor to give meaning to it.
The chancellor is often considered to be the regent's right hand and highest ranking minister. If so, the officeholder is often heavily involved in administering citizens, kingdom projects, etc. Competing for the highest rank in the kingdom are also the Prince and sometimes the Constable and the regent's spouse if those exist in the kingdom.