Trade globalization means that people from different countries and places are buying and selling things with each other. Just like how you might trade your toy with your friend for their toy, countries also trade things like clothes, toys, and even food.
For example, let's say you live in the United States and you want to buy a toy that is made in China. Trade globalization allows you to buy that toy even though it was made in a different country. This is because companies in different countries can work together to make and sell things.
Sometimes, there are rules and agreements that countries make to help trade globalization happen. These rules and agreements are called free trade agreements. They allow countries to trade with each other more easily and without so many restrictions or taxes.
Overall, trade globalization is like a big toy store where everyone can buy and sell their toys with each other, no matter where they come from.