After purchasing a gazebo, you want to make sure it's going to last as long as possible. There are several ways to protect your gazebo, including the following:
Apply a sealant to your gazebo every year per the Backyard Discovery instruction manual.
Check for pests. Termites will be your biggest issue, but there are other pests to be aware of as well, including bees and spiders. To protect your gazebo (and yourself), consider spraying an insect repellant or have your gazebo inspected and treated frequently by a professional.