On-Page Optimization
Analyse the HTML page for heading structure, keyword usage, and link health.
> Note: This skill owns internal link analysis. For external/outbound link strategy (dofollow/nofollow, anchor text quality, domain diversity), see the backlink-monitoring skill.
1. Heading validation
Check all <h1> through <h6> elements:
| Check | Status | Rule |
|---|---|---|
| No headings at all | ❌ FAIL | Every page must have at least one heading |
No <h1> tag |
❌ FAIL | Every page must have exactly one <h1> |
Multiple <h1> tags |
⚠️ WARN | Recommend a single <h1> per page |
| Hierarchy skipped (e.g. H2 → H4) | ⚠️ WARN | Headings should follow sequential order: H1 → H2 → H3 |
| Empty heading (no text content) | ❌ FAIL | All headings must have descriptive text |
| Single H1, proper hierarchy | ✅ PASS | Heading structure is correct |
2. Keyword analysis
If a target keyword is provided, check its usage across the page:
Keyword density
- Calculate:
(keyword_count / total_words) × 100 - Ideal range: 1.0–3.0%
- Below 1.0% → ⚠️ WARN "Keyword density is low"
- Above 3.0% → ❌ FAIL "Keyword stuffing detected"
- Within range → ✅ PASS
Keyword placement — check all of these:
| Location | How to check | Missing = |
|---|---|---|
<title> tag |
Does the title contain the keyword? | ⚠️ WARN |
<h1> tag |
Does the H1 text contain the keyword? | ⚠️ WARN |
| Meta description | Does <meta name="description"> contain the keyword? |
⚠️ WARN |
First <p> tag |
Does the first paragraph contain the keyword? | ⚠️ WARN |
| Image alt text | Does any <img alt="..."> contain the keyword? |
⚠️ WARN |
Title keyword position
- Keyword at position 0 (start of title) → ✅ PASS "Best placement"
- Keyword at position ≤ 20 → ✅ PASS "Near the start"
- Keyword at position > 20 → ⚠️ WARN "Place it earlier for better ranking"
3. Link analysis
Examine all <a href="..."> elements:
Classify links
- Internal:
hrefstarts with/,./,../, or# - External:
hrefstarts withhttp://orhttps://
Checks
| Check | Threshold | Status |
|---|---|---|
| Internal link count ≥ 3 | Minimum 3 per page | ⚠️ WARN if below |
Links with no anchor text (and no child <img>) |
Any count > 0 | ⚠️ WARN |
Internal links with rel="nofollow" |
Any count > 0 | ⚠️ WARN "Prevents PageRank flow within your site" |
Always report the count of internal and external links found.
Edge cases
- If no keyword is supplied, skip keyword analysis and note: "No target keyword supplied — skipping keyword analysis"
- Count words by splitting text on whitespace; keyword matching is case-insensitive
- For link classification, ignore
javascript:,mailto:, andtel:hrefs - Single-page applications (SPAs) with hash-based routing (
#/page) — treat#-prefixed hrefs as internal links - Next.js
<Link>components render as standard<a>tags in HTML output — audit the rendered HTML, not the JSX - Pages with zero links (e.g. legal/privacy pages) should receive ⚠️ WARN, not ❌ FAIL
