Amandeep writes:
Auto-Highlight in Outliner is an addon for Blender's Outliner that was developed in response to a request by a member of the Blender community. It streamlines your workflow by automatically expanding the Outliner to show the selected object whenever you click on it in the 3DView.
While Blender does have a button to expand the Outliner to show the selected object, it requires an extra button press each time. With the Auto-Highlight in Outliner addon, this process is automated, saving you time and effort in navigating a large scene with many objects.