Buzzfeed said this about her...
Marley was invited to create her own online publication, Marley's Mag, for Elle.com after running the hugely successful book drive #1000BlackGirlBooks.
The aim of the campaign, which launched in November 2015, was to collect and donate 1,000 books in which black girls are the main characters.
Marley said this was "important because when you are young you want to read lots of books, but you especially like to read books with people that look like you".
In her mission to "create this space where black girls' stories are read and celebrated in schools and libraries", the schoolgirl collected more than 7,000 books.
It led to Marley being interviewed on The Ellen Show and meeting with Oprah Winfrey and Michelle Obama.
"I've always said that books have taken me on many adventures, but none of those adventures have been quite like this one," Marley wrote in her first editor's letter. "This isn't a dystopian novel or a fantasy. It's my real life. I, Marley Emerson Dias, have gotten the chance of a lifetime. I'm creating a brand-new zine for one of the most-read magazines in the world."