Markdown is a simple way to add structure to plain text using a few symbols. It is like marking a draft with clear headings and lists without opening a formatting toolbar.
For example, a line beginning with a hash can become a heading, and a dash can begin a list item. The text stays readable even before a website turns it into styled content.
Markdown is used for notes, documentation, and articles. Different tools may support slightly different extras, so simple formatting is safest when sharing a file.