{
  "slug": "category-market-share",
  "name": "Content-category search market share",
  "aliases": [
    "market_share_category",
    "Share by content category"
  ],
  "definition": "Your own CTR-modeled share of the tracked search demand within one page-side content category, such as product pages or help content.",
  "category": "Search market share",
  "type": "share",
  "unit": "% of the tracked search demand within the category",
  "direction": "higher-better",
  "verification": "verified",
  "calculation": "One grouped read on the customer-category dataset: the page-side content category as the dimension and the category share measure as the metric, with brand and intent applied as re-weighting parameters rather than ordinary row filters. The semantic layer defines that measure as the category's summed daily demand share over the period's category total, scaled to a percentage on the same basis as the rest of the family. It is YOUR share within the category, that dataset carries no per-competitor columns at all, so no rival column can be selected beside it. Reconciled against the product's own category tab on a live tenant (32.6866 read against a displayed 32.69%, and 0.0344 against 0.03%).",
  "aggregation": "Not summable across categories, categories do not partition the tracked demand and each row is a share against its own slice.",
  "grain": "One content category × segment × period × medium.",
  "dimensions": [
    "category",
    "intent",
    "brand",
    "rank_bucket"
  ],
  "requiredFilters": [
    "segment_id",
    "selected_period",
    "source_medium"
  ],
  "sources": [
    "rank-tracking"
  ],
  "reports": [
    "search-market-share-report"
  ],
  "skills": [
    "market-share-review",
    "content-decay-refresh",
    "monthly-exec-review"
  ],
  "verbs": [
    "market_share_breakdown",
    "growth_vs_market_share"
  ],
  "rungs": [
    "R2"
  ],
  "levers": [
    "L2",
    "L3"
  ],
  "questions": [
    "Which content categories hold the most search market share?",
    "Is our product content losing ground faster than our editorial content?"
  ],
  "interpretation": "A read on where your content estate is strong, not a competitive standing. Because that dataset has no rival columns, the correct sentence is \"we hold X% of the tracked demand in this category\", never \"we lead this category\".",
  "caveats": [
    "This is your own share within the category, not share of voice against tracked rivals, the underlying dataset carries no competitor columns.",
    "Categories are PAGE-side content categories, not keyword groupings; a keyword-side category read is a different question.",
    "Category is a filter and a group-by only on this dataset: the category column on the keyword-and-page dataset is not selectable, so a category breakdown routes here and joins clicks from a separate read.",
    "The click leg switches source with the filter, a brand or intent filter routes it to the keyword-and-page combined table, an unfiltered read to the page combined table. That mirrors the product, but the two are different populations.",
    "Clicks come back null on a tracked segment: the whole-domain click read would overstate it and the segment's own filters cannot be reconstructed on that side. The share stays segment-scoped and correct.",
    "The union of the share rows and the click rows keeps one-sided rows, so a category can show share with no clicks, or clicks with near-zero share."
  ],
  "freshness": "~1 day behind, Daily observation, available the following day.",
  "failureModes": [
    "Presenting a category share as a competitive position.",
    "Requesting a category group-by together with competitor columns, which the verbs refuse with a steer rather than returning a plausible wrong number."
  ],
  "notSameAs": [
    {
      "slug": "search-market-share",
      "why": "Segment share is share of voice against tracked rivals; category share is your own share within a content category, on a member that has no competitor columns."
    }
  ],
  "related": [
    "search-market-share",
    "page-market-share",
    "competitor-share-by-rank-bucket"
  ],
  "workflows": [],
  "lastVerified": "2026-08-04"
}