Chapter 6 — Further Reading

Sources are grouped by the book's three evidence tiers (style bible §7). Tier 1 is where to start and what to trust: Google's own words and the documented public record. Tier 2 is useful industry context — real, but treat specific figures with care. Tier 3 is this book's own constructed material. A suggested reading order follows.

Tier 1 — Verified canonical (start here, trust most)

• Google Search Central — "Google Search's core updates and your website." Google's official guidance on what a core update is, why "there's nothing wrong" with pages that drop, and the self-assessment questions to ask about your content. The single most important document for this chapter.
• Google Search Central — "Creating helpful, reliable, people-first content." The people-first self-assessment behind the Helpful Content system (§6.4), including the "who, how, and why" questions and the guidance on content made for search engines vs. for people.
• Google Search Status Dashboard (Ranking) & the "Google Search ranking updates" history page. Google's public, dated log of confirmed ranking updates — the tool you use in §6.5 to check whether an update actually coincided with your traffic change. Bookmark both.
• Google Search Central — Spam policies for Google web search & the "link spam / SpamBrain" announcements. What Google's spam systems target and how SpamBrain is used to detect spam and neutralize manipulative links (§6.2).
• Google Search Central Blog — "Finding more high-quality sites in search" (Feb 2011). The original Panda announcement, including Google's stated ~12% of U.S. queries affected and the "low-value add" framing. The origin document for Case Study 1.
• Google — "More guidance on building high-quality sites" (2011). The "questions to ask about the quality of your content" list — visibly the ancestor of the 2022 people-first self-assessment.
• Google — the BERT announcement ("Understanding searches better than ever before," Oct 2019). Where Google states BERT's ~1-in-10 English-query reach and frames it as a major advance in understanding language (§6.2; see also Chapter 2).
• Google Search Central — "About Search Console: Manual actions report" and the reconsideration-request documentation. The authoritative source on the manual action path — the thing a core-update demotion is not (§6.2, §6.6; full treatment in Chapter 26).
• Google Search Central — Page Experience documentation & the Core Web Vitals guidance. What the 2021 Page Experience update bundled and how Google frames it as a tiebreaker (§6.2; full treatment in Chapter 16).

Tier 2 — Attributed, specifics unverified (useful context, verify figures)

• Search Engine Land & Search Engine Roundtable — algorithm-update coverage and archives. The most complete running chronicle of named and unnamed updates (including the industry naming of "Medic"). Excellent for timing and context; treat any specific traffic-impact percentages as estimates, not facts.
• Moz — "Google Algorithm Update History." A long-running, dated timeline of updates with short descriptions. Good orientation; the same caution on impact numbers applies.
• Third-party SERP-volatility trackers (e.g., vendor "sensor"/"weather" tools). Useful as an early-warning signal that something is moving across the web (§6.1, §6.5). Remember what they can and cannot tell you: rough weather, yes; what it means for your site, no.
• HouseFresh — "How Google is killing independent sites like ours" (2024). A widely-cited first-person account from an affected independent publisher; the primary reference for Case Study 2. Read it as a documented account of one site's experience and argument, not as a neutral measurement of the update.
• Trade-press coverage of the 2023–2024 Helpful Content / core updates and the independent-publisher debate (The Verge, Search Engine Land, and others). Documents the contested pattern (independent sites down, large brands/forums up) that Case Study 2 examines.

Tier 3 — Illustrative / constructed (this book's own material)

• Rivertown Home Services — the running Strategy File; all figures are a constructed teaching example. This chapter's update-resilience check appears in §6's 📈 The Strategy File.
• Figure 6.1 ("Is this an update, or is this me?") and Figure 6.2 ("Rivertown's update exposure") — constructed teaching renderings, not real Search Console data.

Suggested order

1. Google's core-updates guidance (Tier 1) — the mental model for the whole chapter.
2. Google's people-first content guidance (Tier 1) — the standard everything else measures against.
3. The Panda announcement + the 2011 quality-questions guidance (Tier 1) — see how old and stable the principle is (Case Study 1).
4. Bookmark the Search Status Dashboard and ranking-updates history (Tier 1) — then practice the §6.5 diagnosis against your own Search Console.
5. A reputable update timeline (Moz or Search Engine Land, Tier 2) — for context and dates, reading impact figures skeptically.
6. The HouseFresh piece + trade coverage (Tier 2) — for the contested, limits-of-the-principle story (Case Study 2).
7. Forward pointers: Chapter 12 (content audit/pruning), Chapter 26 (manual actions & disavow), Chapter 35 (YMYL & the Medic lesson), and Chapter 36 (AI Overviews & the diversification payoff).