When you're installing a body lift kit, brackets come in very handy.
When you're performing a body lift, there are a number of parts that will need to be supported or repositioned with a bracket. For example, in many off-road vehicles, the radiator is mounted to the body, so when the body lifts 50mm, the engine fan is out of line with the radiator, spoiling airflow.
A quality body lift kit should include quality brackets for multiple uses. A decent body lift kit should include radiator brackets to ensure you can align the radiator back to its original position and restore airflow to its best. The kit should also include brackets for any number of other potential uses.