In my opinion, I think it depends on the orignality, adherence to the rules, like writing not less than 300 words, using copyright free images. Another thing is the way of writing, paragraphing, spacing, bolding key elements. Also, how amusing or fascinating your piece of writing is ,is a relevant factor. Some are more fun to read than others.. others put more work in their writings than others.. some are boring and straightforward but others are simply catchy.
I think these are a few of the criteria that I know of.
More effort in the work is the main key!
Thanks