Probate is a common term used when referring to an Estate.
The word “probate” today, is commonly intended to mean a Certificate of Appointment of Estate Trustee, either with or without a Will.
It is the Court process used in Ontario, when it is necessary to prove that a Will is valid and to appoint Executors and Trustees named in the Will.
If there is no valid Will, then the application is seeking to appoint an administrator who will act as Trustee and to distribute your estate according to Ontario statute.