The main characteristic of cultural imperialism is that the cultural products of a first-world country "invade and conquer" the culture of a third-world country. It has been a significant focus of study since the 1970s.
Cultural imperialism can best be defined as a custom of promoting a more powerful culture over a weaker, less economically robust culture. It typically takes the form of a formal policy or a culture's general attitude.
In business terms, the goal of cultural imperialism is to dominate another culture through goods and services provided by the first-world culture. In many cases, other countries see this as a threat. While there are benefits to the goods and services, they often come with the cost of hurting that country's local markets and way of life.