🔍 Module 12 · SEO🔴 AdvancedLESSON 42 · MODULE FINAL

Structured Data (JSON-LD)

⏱️ 16 min read

📖 Theory + Code

🧩 5 Quiz Questions

🏗️ 1 Challenge

Course progress26%

🎯 What you'll learn: What Schema.org and JSON-LD are, how to embed structured data in a <script> tag, and how it unlocks Google's rich results.

Section 1

What Is Structured Data?

Structured data is machine-readable markup that explicitly labels what your content means — "this number is a price," "this text is an author name" — using a shared vocabulary from Schema.org. Search engines use it to build rich results: star ratings, prices, FAQ dropdowns, course cards, directly in search listings.

Section 2

JSON-LD in a script Tag

JSON-LD is the format Google recommends. It lives in a <script type="application/ld+json"> block — completely separate from your visible HTML, so it can't accidentally break your layout.

json-ld-article.html

HTML

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Article",
  "headline": "How Semantic HTML Improves SEO",
  "author": { "@type": "Person", "name": "Irfana Aslam" },
  "datePublished": "2026-01-15"
}
</script>

⚠️

It must be valid JSON

A single missing comma or stray trailing comma breaks the entire block silently — always validate it before publishing.

Section 3

Common Schema Types

@type	Used for
Article	Blog posts, news articles
Course	Educational course pages (like this one!)
Product	E-commerce product listings with price/availability
FAQPage	FAQ sections — enables expandable Q&A in search results
Organization	Company/brand identity information

json-ld-course.html

HTML

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Course",
  "name": "Advanced HTML Mastery",
  "provider": { "@type": "Organization", "name": "BitWithBite" },
  "isAccessibleForFree": true
}
</script>

Section 4

Verifying It Works

Google provides a free Rich Results Test tool that parses your page and shows exactly which rich result types it detects (or which errors block them). Always test structured data before assuming it's correct.

🧩 Knowledge Check — Lesson 42

5 questions to test your understanding.

1. What vocabulary does structured data typically use?

2. Where does JSON-LD structured data live in the HTML?

3. What happens if the JSON in a JSON-LD block has a syntax error?

4. Which @type would you use for an FAQ section?

5. What tool can you use to verify your structured data works?

💪

Coding Challenge — Lesson 42

Apply what you learned · Advanced Level

Challenge: Add Article Structured Data

Write a JSON-LD script block of @type "Article" for a blog post titled "10 HTML Tags You Never Knew Existed", published 2026-02-01, authored by a Person named "Irfana Aslam".

💡 Show hints if you're stuck

Required keys: @context, @type, headline, author, datePublished.

✅

Module 12 Complete!

You can now write proper SEO meta tags and structured data. Next up: HTML5 APIs — starting with Data Attributes.

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Lesson 42 of 62Final Lesson — Module 12

Structured Data (JSON-LD)

What Is Structured Data?

JSON-LD in a script Tag

Common Schema Types

Verifying It Works

Lesson 42 Complete — Module 12 Finished!