A Markdown file is just a plain-text file with a bit of shorthand in it. You write things like #, **bold**, and [link](url) instead of using a rich-text toolbar. Most people save it as .md or .markdown.
It is still text, so any editor can open it. The Markdown syntax tells the renderer what to do with the content. That is why Markdown shows up in docs, blog posts, README files, and plain writing workflows.
This is what a small Markdown file can look like:
Markdown stays easy to edit, easy to store in Git, and easy to share. One file can turn into a web page, a PDF, or a Word document without much extra work.
You will see Markdown files in GitHub repos, documentation sites, note apps, knowledge bases, and editors with a markdown reader or markdown preview mode.
If you want the quick rules for headings, bold, italics, links, tables, and code blocks, the Markdown Cheat Sheet is the better next step.
Yes. It is plain text, just with Markdown syntax added so software can render the formatting.
Usually nothing important. Both are Markdown file extensions, but .md is the one you see most often.
Yes. That is one of the main reasons people use it. A Markdown file can be exported to HTML, PDF, DOCX, and more.
It is easy to write, easy to preview, and easy to turn into pages that search engines can read. That makes it useful for content teams and SEO work too.