impression-share-diagnostics
Installation
SKILL.md
Impression Share Diagnostics Skill
Purpose: Provides expert analysis of impression share metrics to diagnose root causes of underspending and auction performance issues in Google Ads Search campaigns.
Type: Domain knowledge skill (auto-invoked)
What This Skill Deliberately Does NOT Do
- Calculate the budget change. Diagnosis ends at "budget is (or isn't) the constraint" — the sizing math (5-10% caps, adjustment factors, daily translation) lives in
budget-recommendation-calculator. - Diagnose PMax with the decision tree. Performance Max has no impression share metrics — the scenarios apply to Search campaigns (plus the bid-cap check for Display/Video remarketing). PMax gets budget-utilization and asset diagnostics instead (see the campaign-type section).
- Treat Rank Lost IS as a target. The skill reads it as evidence for the constraint diagnosis, never as a number to optimize down — chasing it is the misconception this skill exists to correct.
- Pull the metrics. The required API fields are listed under Data Sources Required; the query templates live in
gaql-query-patterns.