Individual skill

external-links

Use when auditing content pages for citation quality, suggesting authoritative sources to link for factual claims, or reviewing whether a page's external link attributes (nofollow, noopener) are correctly set.

skills/external-links/SKILL.md

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Last checked: Nov 9, 2026

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Repository stars (not skill ratings): 74,681
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SKILL.mdcore · 3,096 bytes
SKILL.mdcore · 3,096 bytes
references/rule.mddoc · 3,781 bytes

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# Add relevant external links

Outbound links to authoritative sources strengthen the credibility of your content and are considered a positive trust signal by Google. Pages that cite their sources rank better for informational queries than those that make unsupported claims.

## Quick Reference

- Link out to authoritative sources that support your claims — this demonstrates E-E-A-T and improves credibility
- External links to reputable sites do not hurt your SEO; Google treats them as a trust signal
- Use `rel="noopener noreferrer"` on external links; add `rel="nofollow"` only for untrusted or paid links

## Check

For each content page, count the number of external `<a href>` links pointing to domains other than the current site. Check: (1) Are factual claims backed by links to authoritative sources (government sites, peer-reviewed research, official documentation)? (2) Do all external links have `rel="noopener noreferrer"` for security? (3) Are paid or sponsored links marked with `rel="sponsored"` or `rel="nofollow"`?