Require info about tasks

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Hi, I want to know a bit about these tasks. I have accepted several tasks and all of it is still pending. So, I've no idea whether my task is accepted or rejected. Anyhow, according to the instructions, we are asked to write about any aspect of the given topic. So, that means if we were asked to write about a certain product, we just search about the product and elaborate on it, right? Did I get the concept right ? Because I'm a bit worried that I wrote the wrong kind of stuff, and after all the time spent, I may get rejected because of that. I can't stop thinking about this...So, can I get some specific advice or info about this task? I'd really appreciate your help.. My second question is, what's a back link? I've seen others use this word, and... My third question is, is Sharon Bucks's the only Task Creator here? (I'm just wondering)