How can I repair a damaged tree trunk to ensure the tree's health and longevity?

To repair a damaged tree trunk and promote the tree's health and longevity, you can start by trimming any jagged edges and removing loose bark. Then, apply a wound dressing or sealant to protect the exposed area. Make sure to keep the tree well-watered and fertilized to support its recovery. Consulting with a professional arborist may also be helpful for more extensive damage.