A will is just a document with a set of instructions about how an estate's assets should be distributed and who should be in charge of that distribution. For the instructions to be followed, they must be given legal effect. The only way that can be done is by going to probate and having a judge approve them.
A trust is a separate legal entity when it is formed. Instead of an estate having assets, they are transferred to the trust. A trustee is named to oversee how those assets are handled.
The distinction might seem like a minor one, but it can be critically important in some circumstances.
An estate planning attorney can advise you on creating an estate plan that fits your unique circumstances. They can also inform you on the differences between wills and trusts and how they might benefit you and your loved ones.
Reference: NWI Times (Feb. 4, 2018) "Estate Planning: Why wills must be recorded."