Concrete reasons for eliminating my uploads.

I would like a more adequate feedback, I have uploaded some of my work to the platform and although some have come to have some I like they are eliminated. The reason that gives me is not too like the moderators and I would like to know what is wrong or what is the problem of what has gone up.
I also say this because I like the page and I want to know to what extent I should improve to have something of mine here.

You already asked in the proper place to pose the question; it doesn't require a thread of its own.