Imagine you have a big box of toys that you share with your friends. Sometimes you let them borrow a toy if they promise to take good care of it. But what if one day someone offers to pay you for your toys? That's what commercialization of space is all about - turning space exploration into a business opportunity.
Instead of just having government agencies like NASA exploring space, companies are starting to join in the fun. They want to build spaceships and rockets to carry people and things to space. But, like your toy box, sending things to space can be very expensive. So, these companies want to make money by selling their services to other companies or governments who want to use space for their own purposes. For example, they might want to put up satellites so they can send TV signals or track weather patterns.
But how do they make money? Just like a lemonade stand, they charge people for the goods and services they provide. So, companies might charge other companies or governments to launch a satellite or to deliver supplies to space stations. They might also create their own space tourism industry, where people can pay to take a trip to space themselves.
Commercialization of space might seem like a strange idea, but companies believe there is a lot of potential to make money and help people at the same time. Who knows, one day you might even be able to take a vacation in space!