Why do people use trust funds instead of a will?
If you simply want to leave money to your children or grandchildren, you could write them into your will. Still, many people use a trust fund because they offer valuable advantages over a will.
One of the biggest benefits is that a trust fund can avoid probate, where the court authenticates your will and approves the executor so they can distribute your assets. An irrevocable trust fund allows for the immediate distribution of wealth to beneficiaries upon certain events, such as your death.
Unlike wills, a trust fund is private. Only the trustee and beneficiaries will know how you want to distribute your assets after death.
Trusts are also capable of including assets held in retirement plans or life insurance policies. Those aren't covered by wills.
Lastly, you can specify how you'd like an asset to be used in a trust. For example, you can specify that the beneficiary receives a certain amount of cash in distributions every year. Or you could say your spouse gets to live in your house until they pass, and then it belongs to the children.