Markdown 101: เปลี่ยนข้อความให้มีโครงสร้างMarkdown 101: words become structure

Markdown is plain text with tiny signals for structure.

You do not design every pixel. You write a document that says:

• this is a heading
• this is a paragraph
• this phrase is important
• this word needs emphasis

Then GitHub, Notion, a blog engine, or a preview tool turns that structure into HTML.

The mental model

Markdown is not a replacement for a designer. It is a fast way to mark the meaning of text.

The useful question is not "how do I make this look blue?" The useful question is:

What job does this line do in the document?

If the line names a section, make it a heading. If it explains an idea, leave it as a paragraph. If one phrase matters, make that phrase bold.

Headings

Headings use # at the start of a line.

# Project Name

## Installation

### Requirements

Use one # for the page title. Use ## for major sections. Use ### for sub-sections.

Avoid jumping from # straight to ####. A README should feel like an outline, not a pile of decorated text.

Paragraphs

A paragraph is just text with a blank line before the next paragraph.

This tool helps a team turn rough meeting notes into a clean summary.

It is designed for weekly project updates, not legal records.

Line breaks inside one paragraph are usually ignored by Markdown renderers. Use a blank line when you mean "new paragraph."

Bold and italic

Use bold for strong importance:

Run **one command at a time** when you are still learning.

Use italic for light emphasis:

This step is *optional* if you already have Node installed.

You can combine them, but do it rarely:

Do ***not*** paste secrets into a public README.

Your first Markdown block

Copy this into any Markdown previewer:

# My First README

This project is a small practice space for learning Markdown.

## Goal

Write a README that is **clear enough for a teammate** to understand.

## Status

This is *not finished yet*, but the structure is ready.

The important part is not that the text is beautiful. The important part is that the document now has a shape.

Checkpoint

Before moving on, make sure you can answer these:

• What does one # mean?
• Why does a blank line matter?
• When should you use bold instead of italic?

Next: Markdown 102 - lists, quotes, and code.