# WeChat and Private-Domain Analytics Overlay

## Metric contract

Separate video, live, mini-program, official account, community, customer service, membership, lifecycle, consent, unsubscribe, complaint, and repeat data.

## Diagnostic chain

Reach -> useful engagement -> service or commerce action -> purchase -> replenishment/repeat -> retention, with contact-frequency and privacy guardrails.

Use holdout or comparable cohorts where possible. Do not attribute all repeat purchase to the most recent message.