Header tag hierarchy (H1, H2, H3) in SEO Fundamentals - Step-by-Step Execution

Concept Flow - Header tag hierarchy (H1, H2, H3)

Start: Page Content

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Add H1: Main Title

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Add H2: Section Title

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Add H3: Subsection Title

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Repeat H2 or H3 as needed

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End: Complete Header Structure

The flow shows how header tags are added in order: main title (H1), then sections (H2), then subsections (H3), maintaining a clear hierarchy.

Execution Sample

SEO Fundamentals

<h1>Main Title</h1>
<h2>Section 1</h2>
<h3>Subsection 1.1</h3>
<h2>Section 2</h2>

This code creates a page with a main title, two sections, and a subsection under the first section.

Analysis Table

Step	Tag Added	Hierarchy Level	Parent Header	Effect on Structure
1	<h1>Main Title</h1>	1	None	Defines main page title
2	<h2>Section 1</h2>	2	H1 Main Title	Starts first section under main title
3	<h3>Subsection 1.1</h3>	3	H2 Section 1	Adds subsection under Section 1
4	<h2>Section 2</h2>	2	H1 Main Title	Starts second section under main title

💡 All headers added following hierarchy: H1 > H2 > H3; no lower-level header added before higher-level parent.

State Tracker

Header Level	After Step 1	After Step 2	After Step 3	After Step 4
H1	Main Title	Main Title	Main Title	Main Title
H2	None	Section 1	Section 1	Section 2
H3	None	None	Subsection 1.1	Subsection 1.1

Key Insights - 2 Insights

Why can't we add an <h3> before an <h2>?

Because <h3> is a lower-level header and should be nested under an <h2>. The execution_table shows <h3> added only after <h2> exists (Step 3).

Can there be multiple <h1> tags on one page?

Typically, only one <h1> is used as the main title. The execution_table shows a single <h1> at Step 1, setting the top hierarchy.

Visual Quiz - 3 Questions

Look at the execution_table at Step 3. What is the parent header of <h3>Subsection 1.1</h3>?

A H3 Subsection 1.1

B H1 Main Title

C H2 Section 1

D None

💡 Hint

Check the 'Parent Header' column at Step 3 in the execution_table.

At which step is the second <h2> tag added?

A Step 2

B Step 4

C Step 3

D Step 1

💡 Hint

Look at the 'Tag Added' column in the execution_table for

tags.

If we add another <h3> after Step 4, under which header should it be nested?

A Under H2 Section 2

B Under H1 Main Title

C Under H3 Subsection 1.1

D No nesting needed

💡 Hint

Refer to the hierarchy levels and parent headers in the variable_tracker and execution_table.

Concept Snapshot

Header tags create page structure:
- <h1>: Main title (only one per page)
- <h2>: Sections under <h1>
- <h3>: Subsections under <h2>
Maintain order: H1 > H2 > H3
Proper hierarchy helps SEO and readability.

Full Transcript

This visual execution shows how header tags build a page's structure. We start with an <h1> as the main title, then add <h2> tags for sections, and <h3> tags for subsections. Each header nests under the higher-level header before it. The execution table tracks each step, showing the tag added, its hierarchy level, and parent header. The variable tracker shows how headers exist after each step. Key moments clarify why lower-level headers can't appear before their parents and why only one <h1> is typical. The quiz tests understanding of header relationships and order. This hierarchy improves page clarity and SEO.