The universal destination of goods means that everything in the world belongs to everyone, not just one person or a select group of people. It's like when you are playing with toys with your friends, and your parents tell you to share. Sharing means that everyone gets a turn to play with every toy, not just one person keeping all the toys to themselves.
In the same way, the earth and everything on it - the trees, water, animals, and even things that people make like houses and food - are meant to be shared by everyone, not just one person or a select group of people. This is important because it helps to make sure that everyone has what they need to live a decent life.
Sometimes, people forget to share, and this can make things difficult for others who don't have what they need. That's why we need to remember that everything in the world belongs to everyone, and we should try to share what we have with others who may not have as much. This way, we can all live happier and healthier lives!