1. Why is heading structure important?
Headings are not just for visual styling (making text bigger/bolder). They provide the logical outline of your document.
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Screen reader users use headings to skim a page, "jumping" from H2 to H2 to find the section they want.
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Search engines use them to understand your content hierarchy.
2. What are the rules for using Headings (H1, H2, H3) in WordPress?
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Never Skip Levels: Do not jump from an H2 to an H4 just because you like the smaller font size of the H4. You must go sequentially: H1 → H2 → H3 → H2 → H3 → H4. Skipping levels breaks the "map" of the page.
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Only One H1: Every page must have exactly one H1, which is the main title of the page. Web services has set this automatically. Site editors will have access to H2 → H6 in the editor.
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Use them for Structure, Not Style: If you just want text to look big, use the "paragraph" block and apply a bold style or change the text size in the block settings, rather than turning it into an inappropriate heading.