How should logs be treated for outdoor use to ensure their longevity and durability?

To ensure the longevity and durability of logs for outdoor use, they should be treated with a wood preservative or sealant to protect against moisture, rot, and insect damage. Additionally, logs should be properly seasoned and maintained to prevent warping and cracking over time. Regular inspections and maintenance, such as reapplying sealant as needed, can help extend the lifespan of outdoor logs.