When that spouse dies, the trust goes to the children or other beneficiaries. There are several reasons why you might consider creating a personal trust. This saves time and legal fees. A trust is a private document. No one but the parties involved can see it.
Documents concerning estates that go through probate court are open to the public.
This means they could sell it without getting hit with a huge tax gain. A will, on the other hand, just dishes out the property after your death. The trustee is a key position. The trustee has a fiduciary responsibility to see that the assets are managed properly and distributed according to the wishes of the grantor. But no credentials are required to be a trustee.