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.
Body lift brackets perform many crucial tasks. During a body lift, brackets come in handy for many other essential actions, ensuring that critical components do not move out of the position that makes them fully effective and making sure parts do not get in the way of each other.
For example, the radiator bottle on some vehicles can get damaged by the air conditioning pulley, given that the bottle has been moved closer to it - but luckily, there's a bracket for that! In situations like this and many others, a bracket is the simple solution instead of having to modify or remove parts.