Chapter 61: On-Page SEO Fundamentals

Image SEO: The alt Attribute & Captions

**Part 13: SEO & Social Sharing** — Chapter 61: On-Page SEO Fundamentals with HTML

LEARNING OBJECTIVES ⌵
  • Write high-ranking, descriptive alt text for Google Images indexation.
  • Differentiate between decorative images (alt="") and content images.
  • Optimize image filenames and directory structures (/images/red-nike-air-max.jpg).
  • Pair images with <figure> and <figcaption> for semantic contextual indexing.
🎬 INTERACTIVE VISUAL PIPELINE Core Architecture Simulation
🌐
1. Input
Directives & Tags
⚙️
2. Parse
Tokenizer & AST
🌳
3. Layout
Box Model & Flow
🎨
4. Render
GPU Paint & Composite
PHASE 1: INPUT & DIRECTIVES
Browser receives declarative markup stream, parsing tag tokens and initializing component state.

📖 The Anatomy of an SEO-Optimized Image

<!-- Perfect Semantic & SEO Image Implementation -->
<figure>
  <img 
    src="/images/sustainable-bamboo-toothbrush.avif" 
    alt="Set of four biodegradable bamboo toothbrushes with charcoal bristles"
    width="800" 
    height="600" 
    loading="lazy" 
    decoding="async">
  <figcaption>Our zero-waste organic bamboo toothbrushes come in recyclable packaging.</figcaption>
</figure>

📌 Key Takeaways

  • Descriptive alt text benefits both blind screen reader users and Google Image search ranking algorithms.
  • Use hyphens in file names (bamboo-toothbrush.jpg) rather than generic camera names (IMG_0042.jpg).
  • --

❓ Knowledge Check

1. Which of the following is correct?

2. Which of the following is correct?