The 25 must-do checks

1. Match dominant search intent

   Publish the format that already wins the SERP: definition, how-to, comparison, or product page. Google’s SEO Starter Guide shows examples of clean site structure.
   Why: relevanceCheck: SERP types + People Also Ask

2. Lead with a clear answer block

   Open with a one-sentence definition or outcome plus a 2-3 sentence summary. This matches scanning behavior found by NN/g’s usability studies on the F-pattern.
   Why: clarityCheck: first 100 words answer the query

3. Write a descriptive, unique title tag

   Front-load the core topic and keep it human. There is no fixed character limit from Google, but concise titles avoid truncation. See creating helpful content.
   Why: CTR + relevanceCheck: unique per URL

4. Write a compelling meta description

   Summarize benefits and set expectations. Not a ranking factor, but it influences clicks. Keep it natural and aligned to the title.
   Why: CTRCheck: includes value + next step

5. Keep URLs short and descriptive

   Lowercase, hyphens, no dates if avoidable. Avoid parameters for primary content. See hierarchy advice in the Starter Guide.
   Why: clarity + shareabilityCheck: 1–5 words, no stop words

6. Use one H1 that matches intent

   One page, one main idea. Do not repeat the title verbatim if a clearer H1 helps.
   Why: structureCheck: exactly one H1

7. Structure H2/H3 for scanning

   Short, parallel subheads that mirror the search journey. Put decisions and steps in headings, not just in body text.
   Why: usabilityCheck: each H2 answers a question

8. Add a small table or checklist

   Summarize criteria, steps, or comparisons. Scannable structure increases comprehension per NN/g research on how little people read.
   Why: comprehensionCheck: one table with a clear caption

9. Include a compact FAQ

   Mirror People Also Ask phrasing and answer briefly. If you publish Q and A on the page, FAQ markup can apply. See FAQ structured data.
   Why: tail coverageCheck: 3–6 questions

10. Use descriptive internal links

    Link to the next best step with crawlable anchors. Avoid JS-only click handlers. See Google’s note on crawlable links.
    Why: discovery + contextCheck: anchors match destination H2

11. Link out to reputable sources

    Cite official documentation or primary research where you make claims. Qualify paid links correctly. See guidance on qualifying outbound links.
    Why: credibilityCheck: 2–4 authoritative citations

12. Optimize images for meaning

    Descriptive filenames and alt text that explain the image’s purpose, not just its object. Follow W3C’s accessibility guidance.
    Why: accessibility + contextCheck: alt text present and useful

13. Optimize images for speed

    Serve the right dimensions, compress, and lazy-load below the fold. Large LCP images hurt performance. See Core Web Vitals.
    Why: LCPCheck: LCP image ≤ 2.5s

14. Add the right structured data

    Article for guides, FAQ for Q and A, BreadcrumbList for hierarchy. Keep markup aligned with visible content and policies. See structured data policies.
    Why: eligibilityCheck: validate in Rich Results Test

15. Set a canonical

    Point to the preferred URL to consolidate duplicates. See Google’s guidance on duplicate URLs.
    Why: avoid duplicationCheck: <link rel=”canonical”> present

16. Check robots directives

    Confirm the page is indexable and links are followable unless you intend otherwise. See robots meta docs in Search Central.
    Why: eligibilityCheck: no unintended noindex

17. Make navigation and breadcrumbs clear

    Show where the page lives and add breadcrumb markup. See Breadcrumb docs.
    Why: orientationCheck: consistent crumb trail

18. Use clean, crawlable pagination when needed

    Long indexes should be useful on their own and easy to crawl. Link to key sections contextually.
    Why: discoveryCheck: next/prev UX + internal links

19. Hit Core Web Vitals

    Targets: LCP ≤ 2.5s, INP ≤ 200 ms, CLS ≤ 0.1 for most users. See web.dev.
    Why: experienceCheck: field data in CrUX/GSC

20. Be mobile-first

    Responsive layout, adequate tap targets, no horizontal scroll. Test real devices.
    Why: primary trafficCheck: small screens first

21. Meet accessibility basics

    Semantics, contrast, focus order, keyboard access, and clear labels. See W3C’s WCAG.
    Why: inclusion + qualityCheck: headings, landmarks, labels

22. Set Open Graph and Twitter tags

    Control link previews to improve social CTR. Image should be relevant and legible.
    Why: sharingCheck: og:title, og:description, og:image

23. Place a clear primary CTA

    One action per page. Repeat near the top and bottom. Match stage and intent.
    Why: conversionsCheck: visible on mobile

24. Track the right events

    Clicks to product pages, downloads, CTA clicks, and FAQ interactions. See GA4 help on events and attribution.
    Why: measurementCheck: UTM + GA4 events

25. Run pre-publish QA

    Validate structured data, check links, fix typos, confirm indexability, and test key flows. Use the Rich Results Test and inspect in GSC after publishing.
    Why: reliabilityCheck: no 404s or console errors

Targets at a glance

Example JSON-LD (Article + Breadcrumb)

<script type="application/ld+json">
{
  "@context":"https://schema.org",
  "@type":"Article",
  "headline":"On-Page SEO Checklist: 25 Must-Do Optimizations",
  "description":"A practical on-page SEO checklist with 25 essentials.",
  "author":{"@type":"Organization","name":"Accord Content"},
  "publisher":{"@type":"Organization","name":"Accord Content"},
  "image":"https://accordcontent.com/og/on-page-checklist.png",
  "mainEntityOfPage":{"@type":"WebPage","@id":"https://accordcontent.com/blog/on-page-seo-checklist/"}
}
</script>

<script type="application/ld+json">
{
  "@context":"https://schema.org",
  "@type":"BreadcrumbList",
  "itemListElement":[
    {"@type":"ListItem","position":1,"name":"Blog","item":"https://accordcontent.com/blog/"},
    {"@type":"ListItem","position":2,"name":"On-Page SEO Checklist","item":"https://accordcontent.com/blog/on-page-seo-checklist/"}
  ]
}
</script>

Pre-publish QA mini-check