A natural forest standard is like a set of rules that grown-ups (or big companies) use to make sure they don't hurt the trees, animals, and plants in a forest. Imagine if you were playing with Legos and you made a tall tower. Now, if you wanted to make sure it didn't fall down, you would need to have some rules like: "Don't bump the table too hard" or "Don't take any pieces away from the bottom." In the same way, people who care about forests have rules they follow to keep them healthy and strong.
For example, they might say things like "Don't cut down too many trees at once" or "Don't harm any endangered animals." These rules help to make sure that the forest stays healthy and that we can enjoy it for many years to come. By following these rules, we protect the plants and animals that live there and make sure they have a place to call home.