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WWW Virtual Library --- Advanced browsing --- Search Engine Optimization (SEO)

Resources to increase the visibility of web sites to search engines.

Broader categories :

WWW Virtual Library --- Advanced Browsing

Starred entries are especially recommended.

New entries are added periodically.

Google's word of caution: What you should know before contacting SEO firms.
The dirty little secrets of search: Well-documented article from the New York Times about the rise and fall of JCPenney in Google search results in late 2010/early 2011.
The Answer Factory: Demand Media and the Fast, Disposable, and Profitable as Hell Media Model: Article from Wired about the content farm Demand Media's business model.
SEO Chat: Articles about SEO world, tools, a newsletter...
Do-it-yourself SEO.: 5-step guide, practical-minded.
SEO Toolkit: 21-step guide to optimize your web site for search engines, more theory than in the previous link. Also in German.
Google Ranking Factors - SEO Checklist: 100 Dos and Donts of on-page and off-page SEO. Rather technical, some articles may be hard to understand for HTML and HTTP beginners.
Google’s 200 Ranking Factors: Some of these ranking factors are proven, some are controversial, others are SEO nerd speculation, but Brian Dean often provides quotes and links about most listed factors.
List of free SEO tools: From the SEO Book. Now requires (free) registration.
What is SEO ?: From Wikipedia.
SEO tips: Some figures, some advice. Quick to read.
Google news forum and archive: Get the answers about the SEO questions you didn't even think of! This is not a resource for SEO beginners.
Google keyword tool: To generate keywords related to a subject.
Matt Cutts blog and videos.: Matt Cutts has the most precise insights about how Google works. No big surprise, he works there... You may also want to read this interview (October 2005).
Backlink watch: Counts and displays links to your site (with anchor text)

PageRanks

A high PageRank helps being listed on top of search engines

PageRank toolbar: Displays the PageRank of every web page you browse.
A background on PageRank: Explains how Google measures PageRank.
PageRank explained: Detailed explanation of PageRank with many graphical examples. Nice!
PageRank in Portuguese: Explains in Portuguese the PageRank system.

AI generated content

Search engines finding out content is AI generated will penalize website

Originality.ai: The most used tool to detect ai generated content and plagiarism. Make sure you don't check "Plagiarism" if not needed to preserve credits.
Writer.com AI Content Detector: It seems AI detection is a bit weak with this one, but could be used as a secondary check.
Content at Scale AI Detector: Good detection of AI generated content without further obfuscation. Oh, and it's free too.