{
  "slug": "total-search-share-paid-leg",
  "name": "Total search share, paid leg",
  "aliases": [
    "Paid presence input"
  ],
  "definition": "The segment-scoped search impression share that total search share uses as its paid input.",
  "category": "Paid and organic",
  "type": "share",
  "unit": "share of available auction impressions (stored 0 to 1)",
  "direction": "higher-better",
  "verification": "verified",
  "calculation": "A single-row read of the averaged search impression share measure on the keyword-grain impression-share dataset, filtered to the segment, the date range and your canonical site URL. It is the same measure the impression-share tool returns, read here without a breakdown.",
  "aggregation": "An unweighted average across keyword-day rows, read as one row for the segment.",
  "grain": "One number per segment and date range.",
  "dimensions": [
    "segment"
  ],
  "requiredFilters": [
    "segment_id",
    "date_range"
  ],
  "sources": [
    "google-ads"
  ],
  "reports": [
    "paid-organic-overlap-report"
  ],
  "skills": [
    "paid-organic-balance"
  ],
  "verbs": [
    "total_search_share"
  ],
  "rungs": [
    "R2"
  ],
  "levers": [
    "L8"
  ],
  "questions": [
    "What is the paid half of our total search share?"
  ],
  "interpretation": "Auction coverage used as a stand-in for paid presence on the results page. It measures eligibility and exposure inside the ad auction, which is a narrower thing than occupying the page, part of why the combined total is labelled an estimate.",
  "caveats": [
    "Impression share is auction coverage, not page occupancy; using it as a presence probability is the approximation the combined total is labelled for.",
    "Stored as a fraction between 0 and 1 while the organic leg is stored 0 to 100.",
    "Unweighted average across keyword-day rows.",
    "Impression share lost to budget is not measured on this dataset. The budget-lost measures exist only on a campaign-grain dataset that no tool reads, so a budget-capped account looks smaller here without the reason being visible.",
    "It ships beside the organic leg under a camel-case payload key the shared format contract cannot classify, so it renders as a bare 0 to 1 number with no percent sign."
  ],
  "freshness": "~1 day behind, Ads reporting settles overnight; same-day spend is provisional.",
  "failureModes": [
    "Treating auction impression share as share of the results page.",
    "Comparing it directly to the organic leg without normalising."
  ],
  "notSameAs": [
    {
      "slug": "total-search-share-organic-leg",
      "why": "Different scales, different denominators: one is a modelled share of tracked demand, the other is a share of available auction impressions."
    }
  ],
  "related": [
    "total-search-share",
    "search-impression-share",
    "impression-share-lost-to-rank"
  ],
  "workflows": [],
  "lastVerified": "2026-08-04"
}