seo-fundamentals
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SEO Fundamentals
> Foundational principles for sustainable search visibility.
> This skill explains _how search engines evaluate quality_, not tactical shortcuts.
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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.
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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:
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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 |
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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 |
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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 |
> Schema enables eligibility for rich results but does not guarantee them.
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6. AI-Assisted Content Principles
Search engines evaluate output quality, not authorship method.
Effective Use
Risky Use
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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.
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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 |
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> Key Principle:
> Sustainable SEO is built on _useful content_, _technical clarity_, and _trust over time_.
> There are no permanent shortcuts.
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