KNOWLEDGE NOTESKnowledge Notes
Explore curated knowledge, course notes and methods, with their existing content and sources preserved.
This index lists complete English editions. Additional Chinese notes and bilingual updates remain available in the Chinese index.
350knowledge notesThe first 6 years of the Google Search Central Blog (2005–2010, ~708 posts): launch and maintenance of the Webmaster Tools platform / evolution of the Sitemap 0.84–0.90 protocol / early spam governance / badware/StopBadware security partnership / start of the Matt Cutts video series / the Vanessa Fox era / launch of the Canonical link element (2009) / international blog branches / first malware warnings / the link economy war (major paid links debate 2007–2008) / duplicate content myth education / first edition of the SEO Starter Guide (2008) / Caffeine indexing architecture (2010) / Site Speed becomes a ranking signal (2010)
The first 6 years of the Google Search Central blog (2005–2010, approximately 708 posts): birth and maintenance of the Webmaster Tools platform / evolution of the Sitemap protocol from 0.84 to 0.90 / early spam governance / badware / StopBadware security partnership / the start of the Matt Cutts video series / the Vanessa Fox era / launch of the Canonical link element (2009) / international blog branches / the first malware warning / the link economy war (major paid links debate 2007–2008) / education on duplicate content myths / first edition of the SEO Starter Guide (2008) / Caffeine indexing architecture (2010) / Site Speed becomes a ranking signal (2010)
5 years of the Google Search Central blog (2011-2015, approximately 528 articles): the double blow of Panda (2011) + Penguin (2012) plus ongoing refreshes / Hummingbird (2013, semantic search revolution) / Knowledge Graph (2012) / Mobilegeddon (April 2015, mobile-friendliness becomes a ranking signal) / Authorship (launched 2011, killed 2014) / Author rank myth debunked / the rise of the Semantic Web / schema.org launch (2011) / Disavow Tool (2012) / Penguin incorporated into core (later, 2016) / rel=alternate hreflang (from 2011) / HTTPS becomes a ranking signal (2014) / full lifecycle of Authorship / mobile-friendly badge / Knowledge Graph + Carousel / Webmaster Conferences shift to Hangouts
Google Search Central Blog 5 years (2011-2015, ~528 posts): Panda (2011) + Penguin (2012) double strike + ongoing refreshes / Hummingbird (2013, semantic search revolution) / Knowledge Graph (2012) / Mobilegeddon (2015-04, mobile-friendly ranking signal) / Authorship (launched 2011, killed 2014) / Author rank myth busting / Semantic Web as the major trend / schema.org launch (2011) / Disavow Tool (2012) / Penguin into core (later, 2016) / rel=alternate hreflang (from 2011) / HTTPS as ranking signal (2014) / Full lifecycle of Authorship / mobile-friendly badge / Knowledge Graph + Carousel / Webmaster Conference shifted to hangouts
Google Search Central Blog 5 years (2016-2020, ~302 posts): AMP launch and expansion (2016) + Mobile-First Indexing announcement (2016-11) + large-scale rollout (started 2018-03) + full web rollout (announced 2020-03, completed 2023-10) / new Search Console rebuild (2018) / HTTPS enforcement (2017-2018 Chrome marks Not Secure) / evergreen Googlebot (one-time upgrade to Chrome 74 in 2019-05) / precursors to the Helpful Content Update / internationalization of Webmaster Conferences / COVID response (virtual events, business hours pause) / Goodbye Flash (2019) / Rendertron / Dynamic Rendering / introduction of the Core Web Vitals concept (2020) / Speed report / Webmasters → Search Central rename (2020-11) / Removals report improvements / FAQ and How-to structured data launch (2019-05) / nofollow → sponsored/ugc (2019-09) / Indexing API for jobs (2018)
Google Search Central blog over 5 years (2016–2020, approximately 302 posts): AMP launch and expansion (2016) + Mobile-First Indexing announcement (November 2016) + large-scale rollout launch (starting March 2018) + full web rollout (announced March 2020, completed October 2023) / new Search Console rebuild (2018) / HTTPS push (Chrome marked "Not Secure" in 2017–2018) / evergreen Googlebot (one-time upgrade to Chrome 74 in May 2019) / premonition of the Helpful Content Update / internationalization of Webmaster Conferences / COVID response (online events, business suspension) / farewell to Flash (2019) / Rendertron / Dynamic Rendering / introduction of Core Web Vitals concept (2020) / Speed report / Webmasters → Search Central rename (November 2020) / Removals report improvements / FAQ and How-to structured data launch (May 2019) / nofollow → sponsored / ugc (September 2019) / Indexing API for jobs (2018)
Google Search Central Blog 6 years (2021-2026, ~211 posts): **Page Experience launch** (2021-05-Q2 mobile, 2022-Q1 desktop) + detailed Core Web Vitals / **Helpful Content Update** (2022-08-25, merged into core in 2024-03) / **Product reviews updates** series (2021-04, 2021-12, etc.) / **link spam update** (2021-07, 2022-12) / **site reputation abuse** (2024-03, 2024-11) / **AI generated content guidance** (2023-02) / **Helpful Content into core ranking system** (2024-03) / **INP into Core Web Vitals** (2023-05) / **August 2024 core update** / **AI Overviews / AI Mode** (2024-2025) / **2025-06 simplifying search results** (major SD cleanup) / **Crawling December 2024 series** (4-post educational series)/ **Robots Refresher 2025 series** / **back button hijacking spam policy** (2026-04) / **FAQ deprecation announcement** (2026-05)
Six years of the Google Search Central blog (2021–2026, approximately 211 articles): **Page Experience launch** (mobile in May 2021, desktop in Q1 2022) + detailed Core Web Vitals coverage / **Helpful Content Update** (August 25, 2022; merged into the core algorithm in March 2024) / **Product reviews updates** series (April 2021 / December 2021, etc.) / **link spam updates** (July 2021 / December 2022) / **site reputation abuse** (March 2024 / November 2024) / **AI-generated content guidance** (February 2023) / **Helpful Content merged into the core ranking system** (March 2024) / **INP added to Core Web Vitals** (May 2023) / **August 2024 core update** / **AI Overviews / AI Mode** (2024–2025) / **June 2025 simplifying search results** (large-scale cleanup of structured data types) / **Crawling December 2024 series** (4 educational articles) / **Robots Refresher 2025 series** / **back button hijacking spam policy** (April 2026) / **FAQ deprecation announcement** (May 2026)
A thematic distillation of 23 Google Search Central blog announcements covering core updates, spam updates, product reviews, and page experience. Google’s own official explanation of how its algorithms have evolved.
A thematic distillation of 38 Google Search Central blog posts covering Googlebot user agents / JavaScript SEO / the mobile-first transition / Page Experience / Core Web Vitals / the rise and fall of AMP / and Crawl Budget.
A thematic distillation of 20 Google Search Central blog posts covering quality policies, E-E-A-T, Helpful Content, the Quality Rater Guidelines, and deceptive behavior policies.
A thematic distillation of 15 Google Search Central blog posts covering robots.txt standardization, sitemap best practices, canonical errors, hreflang in practice, and the Indexing API.
A thematic distillation of 26 Google Search Central blog posts covering site reputation abuse, scaled content, expired domains, link spam, hacked sites, manual actions, and disavow.
A thematic distillation of 18 Google Search Central blog posts covering Google's stance on AI content, RankBrain, BERT, MUM, the Knowledge Graph, AI Overviews, and Succeeding in AI Search.
Three major categories of Google Search Central announcements: (1) Three major event series under Events — Search Central Live (flagship, global, free, 35 cities in 12 languages) + Deep Dive (multi-day in-depth edition) + Unconference (since 2020, user-proposed sessions, 500+ participants); (2) Detailed table of 100+ events in the 2022–2026 Events calendar; (3) Four-year timeline of Latest documentation updates — major changes in 2022/2023/2024/2025/2026: FAQ deprecation in 2026-05 / practice problem removal in 2026-01 / AVIF support in 2024-08 / AI Mode/Overviews counted in SC in 2024-08 / SD simplification in 2025-06 / mobile-first completion in 2024-07 / etc.
5 major sections of Google Search help layer operations: (1) 6-piece Debugging tools set + ngrok tunnel to traverse firewalls; (2) Status Dashboard with 4 statuses + 5 years of history + RSS+JSON API; (3) DMA business user eligibility + appeals process (EEA); (4) European Search Dataset Licensing Program (applications open from 2024-03-07, data available from 2024-04-01, 6 eligibility criteria); (5) 3 forms for reporting spam / phishing / malware + privacy rules
The source of the modern Apple HIG and even the entire field of graphical interface design — two historic classic PDFs. The 1987 *Apple Human Interface Guidelines: The Apple Desktop Interface* (164 pages, the first official HIG) put forward 10 human interface principles; the 1992 *Macintosh Human Interface Guidelines* (418 pages, complete 11-chapter edition) expanded them to 12. The 12 principles: Metaphors / Direct Manipulation / See-and-Point (noun-then-verb) / Consistency / WYSIWYG / User Control / Feedback and Dialog / Forgiveness / Perceived Stability / Aesthetic Integrity / Modelessness / Knowledge of Your Audience. Plus principles of graphic communication (visual consistency / simplicity / clarity). Bilingual. These principles established in 1987 remain the root of [[apple-hig-design-principles]] today.
Drawing on public views from multiple product and design practitioners, this article sorts out overlapping responsibilities, prototype validation, and quality accountability in AI teams; it retains disagreements across different team sizes and career tracks.
32 real website verification tasks, paired comparison of serial and parallel reads, preserving network failures, first-token wait, correctness, and token usage; distinguish tool orchestration from model prefill, and do not promise universal speedup.
This article analyzes newtype's historical n8n MCP configuration: exposing tools via the MCP Trigger, invoking internal workflows, and routing queries by complexity. It also retains llms.txt and the CrewAI Obsidian case as references.
