Check 18 / 19 LOW impact In the full checklist
H2 / H3 hierarchy: one H1, logical H2s
What this check is
Heading levels are the outline of a page for both crawlers and assistive technology. Skipping from H1 to H4 or styling a paragraph as a heading breaks both.
How to implement it
Give each section a real H2 and its subsections H3s, keep the visual size in CSS rather than in the level, and check the templates that use visual headings: buy box labels, tabs, accordions, review titles.
How to verify it
Read the heading outline of a product page and a collection page: one H1, no skipped levels, and every heading describing the section beneath it.
All 197 checks, one Google Sheet
This page is the summary. The full checklist carries the priority, the impact score and the tool link for every check — all 197 of them, across 14 categories, as a Google Sheet and CSV with lifetime updates.
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