Maeng Da Tea, and Green Maeng Da Tea, in particular, is popular mainly because it is known to be one of the most refined forms of Tea available. That means the powder made from Maeng Da Tea might deliver more powerful effects in one dose than your average Tea powder.
The reason for this is that Green Maeng Da Tea is genetically modified. In other words, it has been enhanced to more reliably deliver possible benefits, which is why it became such a popular choice among Tea enthusiasts when it first came out. The hype has settled since then, but it’s still preferred by many.