Indeed, I'd write it more formally as "Markdown lets you focus on the content and structure of your work, with no thought to it's appearance."

For me, this is huge. I take all my notes for all my classes (save classes that require odd symbols such as math) in markdown, because by it's nature it guides my notes into a very nicely structured format. Once I have my content and structure, I can build differently styled documents for all of my different use cases: viewing my notes on kindle, reading them on computer, or printing them.

Markdown's really powerful, and I love using it.