Control who will receive your assets after your lifetime
Control under what conditions your beneficiaries will receive your assets
Structure gifts to your children and grandchildren so that they can receive money for things like education or retirement, but they will not have unrestricted access to any money until the age(s) you deem appropriate
Avoid probate (no mandatory probate fees, paperwork and accountings which must be filed with the court)
Keep your assets, debts, and identities of your beneficiaries private
Save potentially thousands of dollars in estate taxes