To aid you in defining quality, we brought back this post from a couple years ago.
I appreciate the simplicity of the response (and the intended grammatical mistake) from Doug Kessler, co-founder of Velocity: “Quality content resonates with its audience.
Show them three or four pieces of content (without branding) and ask them to stack the content in terms of ability to solve their problem.
It increases a reader’s understanding of a topic in a way they may not have been aware of.
Josh Bernoff, author, Groundswell and Writing Without Bullshit
I try always to consider not only the substance of content, but the structure of it, too.