sickn33/antigravity-awesome-skills/seo-fundamentals
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Core principles of SEO including E-E-A-T, Core Web Vitals, technical foundations, content quality, and how modern search engines evaluate pages.
Install
npx vskill@latest install sickn33/antigravity-awesome-skills/seo-fundamentalsSKILL.md
SEO Fundamentals
Foundational principles for sustainable search visibility.This skill explains _how search engines evaluate quality_, not tactical shortcuts.
1. E-E-A-T (Quality Evaluation Framework)
E-E-A-T is not a direct ranking factor. It is a framework used by search engines to evaluate content quality, especially for sensitive or high-impact topics.
| Dimension | What It Represents | Common Signals | |
|---|---|---|---|
| Experience | First-hand, real-world involvement | Original examples, lived experience, demonstrations | |
| Expertise | Subject-matter competence | Credentials, depth, accuracy | |
| Authoritativeness | Recognition by others | Mentions, citations, links | |
| Trustworthiness | Reliability and safety | HTTPS, transparency, accuracy |
Pages competing in the same space are often differentiated by trust and experience, not keywords.
2. Core Web Vitals (Page Experience Signals)
Core Web Vitals measure how users experience a page, not whether it deserves to rank.
| Metric | Target | What It Reflects | |
|---|---|---|---|
| LCP | < 2.5s | Loading performance | |
| INP | < 200ms | Interactivity | |
| CLS | < 0.1 | Visual stability |
Important context:
- CWV rarely override poor content
- They matter most when content quality is comparable
- Failing CWV can _hold back_ otherwise good pages
3. Technical SEO Principles
Technical SEO ensures pages are accessible, understandable, and stable.
Crawl & Index Control
| Element | Purpose | |
|---|---|---|
| XML sitemaps | Help discovery | |
| robots.txt | Control crawl access | |
| Canonical tags | Consolidate duplicates | |
| HTTP status codes | Communicate page state | |
| HTTPS | Security and trust |
Performance & Accessibility
| Factor | Why It Matters | |
|---|---|---|
| Page speed | User satisfaction | |
| Mobile-friendly design | Mobile-first indexing | |
| Clean URLs | Crawl clarity | |
| Semantic HTML | Accessibility & understanding |
4. Content SEO Principles
Page-Level Elements
| Element | Principle | |
|---|---|---|
| Title tag | Clear topic + intent | |
| Meta description | Click relevance, not ranking | |
| H1 | Page’s primary subject | |
| Headings | Logical structure | |
| Alt text | Accessibility and context |
Content Quality Signals
| Dimension | What Search Engines Look For | |
|---|---|---|
| Depth | Fully answers the query | |
| Originality | Adds unique value | |
| Accuracy | Factually correct | |
| Clarity | Easy to understand | |
| Usefulness | Satisfies intent |
5. Structured Data (Schema)
Structured data helps search engines understand meaning, not boost rankings directly.
| Type | Purpose | |
|---|---|---|
| Article | Content classification | |
| Organization | Entity identity | |
| Person | Author information | |
| FAQPage | Q&A clarity | |
| Product | Commerce details | |
| Review | Ratings context | |
| BreadcrumbList | Site structure |
Only currently supported Google structured-data features create rich-result eligibility; FAQ rich results were retired in May 2026. Generic schema vocabulary alone does not create eligibility.
6. AI-Assisted Content Principles
Search engines evaluate output quality, not authorship method.
Effective Use
- AI as a drafting or research assistant
- Human review for accuracy and clarity
- Original insights and synthesis
- Clear accountability
Risky Use
- Publishing unedited AI output
- Factual errors or hallucinations
- Thin or duplicated content
- Keyword-driven text with no value
7. Relative Importance of SEO Factors
There is no fixed ranking factor order. However, when competing pages are similar, importance tends to follow this pattern:
| Relative Weight | Factor | |
|---|---|---|
| Highest | Content relevance & quality | |
| High | Authority & trust signals | |
| Medium | Page experience (CWV, UX) | |
| Medium | Mobile optimization | |
| Baseline | Technical accessibility |
Technical SEO enables ranking; content quality earns it.
8. Measurement & Evaluation
SEO fundamentals should be validated using multiple signals, not single metrics.
| Area | What to Observe | |
|---|---|---|
| Visibility | Indexed pages, impressions | |
| Engagement | Click-through, dwell time | |
| Performance | CWV field data | |
| Coverage | Indexing status | |
| Authority | Mentions and links |
Key Principle:Sustainable SEO is built on _useful content_, _technical clarity_, and _trust over time_.There are no permanent shortcuts.
When to Use
This skill is applicable to execute the workflow or actions described in the overview.
Example
User request:
Review this campaign asset with @seo-fundamentals, identify the main conversion problem, and produce an improved version grounded in the available evidence.
The bundled seo_checker.py is an advisory source-text heuristic, limited to 50 candidate files. It cannot resolve rendered/framework metadata or certify indexability, ranking or accessibility. Empty alt text can correctly mark decorative images. A no-file result is not a passed audit. Validate findings against rendered pages and current primary search documentation.
Limitations
- Use this skill only when the task clearly matches the scope described above.
- Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
- Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.
Security
- Security scanPassed, 95 of 100Pattern checks on the skill's files.
- Model reviewPassed
Quality evaluation
- Task evaluationNot runNo evaluation yet. Run one in Skill Studio.
Source
- SKILL.md in the repositoryCheckingskills/seo-fundamentals/SKILL.md
Popularity
- Repository stars
- 36,904
- Repository forks
- 6,035
- Repository npm downloads, 7 days
- 6,426
- 7-day trend score
- 73
Stars and forks are for the whole GitHub repository, not this skill alone. Downloads are for the repository's npm package. Refreshed 9 May 2026, 5 months ago.
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