What is global media conglomerates?

I'll start backwards, a conglomerate is a company which consists of a group of different divisions. Many times each division seems to be a different business, but they are all connected under one establishment. It can also be called a multi-industry company.

Media refers to a section of the business industry that specializes in communication. This can take the form of telephone, telegraph, computer, newspaper, radio, movies and television. In a conglomerate, it might be all of them, each with it's own division.

A Global media conglomerate, therefore, would conduct their business, through their various divisions, throughout the entire world, or on a global scale.