Global Engines & AI Indexing Rules
A 2026-edition guide to how pages get found, read and cited, written for the engines that matter now: Baidu, Google, Bing, Yandex, Perplexity, ChatGPT-Search and Gemini. Six modules, working through 200 practical knowledge points covering SEO, AEO, AIEO, GEO, GEO-Local and white-hat practice. Published one topic a day, and every claim carries a link to the official documentation it rests on.
25 of 200 published · a new topic every day at 09:30 US Eastern · 2026 edition with complete authoritative source links
Module 1 ยท Fundamentals
25 published in this module
Crawling vs Indexing: What's the Real Difference?
Topic #1 - plain-English, sourced
Read the topic →What Is Mobile-First Indexing? How Google Crawls
Topic #10 - plain-English, sourced
Read the topic →HTTP Status Codes and Crawling: 200, 301, 404, 5xx
Topic #11 - plain-English, sourced
Read the topic →What Is an Orphan Page? Find and Fix Orphan Pages
Topic #14 - plain-English, sourced
Read the topic →Thin Content: Why It Blocks AI and Search Indexing
Topic #22 - plain-English, sourced
Read the topic →Duplicate Content: On-Site and Republished Fixes
Topic #23 - plain-English, sourced
Read the topic →White-Hat Rules for Republishing and Aggregation
Topic #24 - plain-English, sourced
Read the topic →Each topic carries its own TKD template and links out to the official sources behind every rule. Sitemap · llms.txt