{
  "slug": "serp-volatility-report",
  "name": "SERP volatility and algorithm update report",
  "aliases": [
    "Algorithm update impact report",
    "Google update report",
    "Volatility report",
    "Market event report"
  ],
  "audience": "In-house strategist",
  "job": "Separate a market-wide ranking event from something you did, and quantify how it landed on your keyword set.",
  "cadence": "On demand",
  "summary": "A market-level read of ranking turbulence: how much the result pages moved across the tracked demand, which domain types gained or lost during the window, how page-one composition changed, and where your own set sits inside that movement. It exists to answer the question asked in every update week, was that us or was that everyone, before anyone starts changing pages.",
  "headline": [
    "serp-volatility-index",
    "page-one-footprint-retention",
    "domain-movers-count"
  ],
  "diagnostic": [
    "search-market-share",
    "avg-position",
    "overall-average-rank",
    "clicks",
    "pop-delta",
    "ranking-movement",
    "competitor-share-by-rank-bucket",
    "ranked-keyword-coverage"
  ],
  "guardrail": [
    "total-daily-market-share",
    "market-share-table-clicks",
    "real-noise-verdict",
    "practical-effect-magnitude"
  ],
  "sources": [
    "rank-tracking",
    "search-console"
  ],
  "skills": [
    "update-week-check",
    "anomaly-investigator",
    "serp-feature-watch",
    "significance-referee"
  ],
  "rungs": [
    "R2"
  ],
  "questions": [
    "Did the algorithm update hit us?",
    "Is this drop market-wide or specific to us?",
    "How volatile were results this week?",
    "Which kinds of sites gained during the update?"
  ],
  "workflows": [
    "category-decline-verdict",
    "competitor-movers-deck",
    "twelve-week-drop"
  ],
  "caveats": "Volatility is measured over a tracked keyword set, so an index built on your segments describes your market and not the web. A confirmed update announcement and a movement in the data are separate facts; correlation across the same window is not attribution, and rollouts run for weeks. Most of the standing evidence for this report is internal market monitoring rather than per-customer boards, so treat the customer-facing framing as newer than the underlying data.",
  "verification": "review",
  "lastVerified": "2026-08-04"
}