Administration (probate law)
In common-law jurisdictions, administration of an estate on death arises if the deceased is legally intestate, meaning they did not leave a will, or some assets are not disposed of by their will. Where a person dies leaving a will appointing an executor, and that executor validly disposes of the property of the deceased within England and Wales, then the estate will go to probate.
Source: Wikipedia — Administration (probate law) (CC BY-SA 4.0)