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What is Markdown?
Markdown is a simple way to add structure to plain text (headings, lists, links, tables) using a few everyday symbols. It stays readable as you type, and tools (and AI) understand it instantly.
~3 min read
Beginner
Updated Jun 2026
Markdown in one sentence
Instead of clicking buttons to format text, you type small marks: # for a heading, ** around bold, - for a list. The marks are plain characters, so the file works anywhere and never locks you into one app.
markdown
# Quarterly update We shipped **fast** this quarter. - Faster search - Dark mode
Rendered result
Quarterly update
We shipped fast this quarter.
• Faster search
• Dark mode
• Dark mode
Why it matters for AI
AI tools read structure, not styling. A Markdown file tells ChatGPT or Claude exactly what's a heading, a list, or a table — so it understands your document instead of guessing. That's why clean Markdown gets you better answers.
New here? You don't need to memorize anything. Skim the syntax basics, and copy from examples as you go.