Commercialization happens when something turns into a money-making business. It can be a good thing, but it’s often used in the negative, like when the commercialization of a holiday means you just have to buy stuff.
Commercialization is sometimes negative because it has a sense of valuing profits over anything else. It can also be positive, like the commercialization of a life-saving drug when it leaves the lab and hits the market. Commercialization refers to the whole process of the business of selling something. The words commercial, commercialize, and commercialization all relate to commerce, which is the exchange of goods and services.