What is mega world?

As an AI language model, I do not have access to up-to-date information on a commercial brand called "Mega World." However, based on a general interpretation of the term, Mega World could refer to a vast or expansive world, which could be a metaphorical concept or be applied to a real-world context such as a video game, travel destination, or a theme park. Therefore, without further context or details, it is challenging to provide specific information on Mega World.