Where the lift shows up.
The proof TV is working. TV is unclickable, so the human response shows up downstream - in brand search, direct visits, organic, and conversion paths. Visible in GA4 within 48 hours of meaningful spend changes. This is the layer CFOs trust because they can validate it without our tools.
Lift by channel · TV-flight window vs TV-dark baseline
Method: rolling 14-day partial correlation between TV spend and downstream channel revenue, controlled for seasonality + promo cadence. When TV ramps, brand search + direct + Pmax should follow within 5-21 days depending on the channel's natural lag.
AEO / GEO surface rate · 12 weeks · LLM brand visibility
Weekly query batch hits gpt-4o + Claude Sonnet 4.6 + Perplexity sonar with 30-40 brand-relevant prompts. Tracks brand mentions + citations in LLM outputs. Rising surface rate = brand discoverability is improving in AI-powered search. Weekly query batch hits gpt-4o + Claude Sonnet + Perplexity sonar-pro with ~30 brand-relevant prompts; local Ollama parses brand mentions + citations from each response. Cost: ~$40-55/mo per brand for the LLM API calls (in v1 ship per strategic roadmap).