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-fundamentals

SKILL.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.

DimensionWhat It RepresentsCommon Signals
ExperienceFirst-hand, real-world involvementOriginal examples, lived experience, demonstrations
ExpertiseSubject-matter competenceCredentials, depth, accuracy
AuthoritativenessRecognition by othersMentions, citations, links
TrustworthinessReliability and safetyHTTPS, 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.

MetricTargetWhat It Reflects
LCP< 2.5sLoading performance
INP< 200msInteractivity
CLS< 0.1Visual 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
ElementPurpose
XML sitemapsHelp discovery
robots.txtControl crawl access
Canonical tagsConsolidate duplicates
HTTP status codesCommunicate page state
HTTPSSecurity and trust
Performance & Accessibility
FactorWhy It Matters
Page speedUser satisfaction
Mobile-friendly designMobile-first indexing
Clean URLsCrawl clarity
Semantic HTMLAccessibility & understanding

4. Content SEO Principles

Page-Level Elements
ElementPrinciple
Title tagClear topic + intent
Meta descriptionClick relevance, not ranking
H1Page’s primary subject
HeadingsLogical structure
Alt textAccessibility and context
Content Quality Signals
DimensionWhat Search Engines Look For
DepthFully answers the query
OriginalityAdds unique value
AccuracyFactually correct
ClarityEasy to understand
UsefulnessSatisfies intent

5. Structured Data (Schema)

Structured data helps search engines understand meaning, not boost rankings directly.

TypePurpose
ArticleContent classification
OrganizationEntity identity
PersonAuthor information
FAQPageQ&A clarity
ProductCommerce details
ReviewRatings context
BreadcrumbListSite 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 WeightFactor
HighestContent relevance & quality
HighAuthority & trust signals
MediumPage experience (CWV, UX)
MediumMobile optimization
BaselineTechnical accessibility
Technical SEO enables ranking; content quality earns it.

8. Measurement & Evaluation

SEO fundamentals should be validated using multiple signals, not single metrics.

AreaWhat to Observe
VisibilityIndexed pages, impressions
EngagementClick-through, dwell time
PerformanceCWV field data
CoverageIndexing status
AuthorityMentions 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

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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