Is the meaning of this sentence clear? “Meaningful” usually means “important” I think the meaning is fairly clear. It is imprecise because you don’t mention what aspect of the media you are talking about. The wording is not good. How significant is the media to a celebrity’s success?

No, it doesn't work. How about: How significant are the media to a celebrity's success? Also acceptable nowadays: How significant is the media to a celebrity's success?

No, I'm afraid it's not very clear. Here are a couple of ways to rephrase what I think you're saying: "How great an impact does the media have on the success of celebrities?" or "How much does the media affect celebrities' chances of success?" (I tried to stay fairly close to your wording, but someone else may be able to offer a more concise or elegant option.)

Hello, it is almost correct. This way would be correct : - How significant is/are the media to celebs going far? "Media" can be plural or singular in English. However, I don't usually say "celebs" in spoken language as an American from New York. I usually see it written as a short form of "celebrities". Also, I am not quite sure if it should be "celebs" or "celebs' " above since I don't usually write a sentence phrased like that. Here is what I would say (personal preference): - How significant is the media to celebrities' success? Hope that helps :)