Search Engine Optimization (SEO) is the practice of improving website visibility and rankings in organic search engine results, primarily Google. It encompasses technical implementation, content strategy, and authority-building to help search engines understand, crawl, index, and rank web pages. In 2026, SEO has evolved into a multi-surface discipline spanning AI-powered answer engines, generative search, voice assistants, social search, and agentic AI — making Generative Engine Optimization (GEO), structured data, topical authority, and E-E-A-T (Experience, Expertise, Authoritativeness, Trustworthiness) more critical than ever. A key mental model: search engines and AI models reward content that best satisfies user intent with demonstrated authority — with ~65% of Google searches now ending without a click, visibility increasingly means being cited by AI, not just ranking in blue links.
What This Cheat Sheet Covers
This topic spans 15 focused tables and 191 indexed concepts. Below is a complete table-by-table outline of this topic, spanning foundational concepts through advanced details.
Table 1: Keyword Research & Intent
| Strategy | Example | Description |
|---|---|---|
Informational: how to tie a tieTransactional: buy nike running shoes | Four primary intents: informational (learning), navigational (finding a site), commercial (researching), transactional (purchasing) — match content type to intent | |
best waterproof hiking boots for winter | • 3+ word phrases with lower search volume but higher conversion rates • target specific user intent and are easier to rank for than broad terms | |
Cluster: coffee maker + best coffee machines + coffee brewing guide | • Group related keywords by search intent and topic to create comprehensive content hubs • improves topical authority | |
<h1>Guide to Keyword Research</h1> (within first 100 words) | • Include target keyword in title, H1, first paragraph, and URL • signals topical relevance without keyword stuffing | |
What is SEO? → feature in SERPs | • Google feature showing related questions • optimize content to answer these for featured snippet and AI Overview opportunities | |
Low: vegan recipes for beginnersHigh: best laptop 2026 | • Metric (0–100) estimating ranking competition • low-difficulty keywords offer quicker wins • high-difficulty require strong domain authority | |
Two pages targeting email marketing tools | • Multiple pages competing for same keyword • consolidate or differentiate content to avoid diluting ranking signals |