GA4 hostname investigation and filter review

Property / stream / owner:
Review dates / property timezone / export time:
Symptom and baseline event counts:
Existing active include-only / exclude filters:

HOST INVENTORY
Exact reported hostname | expected use | owner | journey verified | decision
Production / www / shop / checkout / booking / other linked domains:
Preview / staging / development domains:
Missing, empty, malformed or duplicate page_location observations:
App streams and server/offline events that need separate review:

COLLECTION CHECK
Controlled page URL / final destination / event name:
Browser tag / server sender / page_location override:
Edge request coverage / origin coverage / clock offsets / cache handling:
Received enquiry or order / qualified outcome (aggregate only):
Finding / alternatives still unresolved:

PROPOSED FILTER -- do not activate from an unreviewed template
Operation / exact hostname string / match type / unique filter name:
Expected matching hosts / expected non-matching hosts:
Legitimate checkout / booking / server-event tests:
State: Testing
Created at / validation after the documented processing delay:
Exploration: Hostname + Event name + Test data filter name; Event count
Unfiltered comparison retained / test-label results / unexpected hosts:
All active include-only filters reviewed as a union; excludes reviewed afterward:
Activation owner / success criterion / recovery plan / follow-up date:
If made inactive later, previously discarded data cannot be recovered by that change.

OPTIONAL BIGQUERY REVIEW
Project / dataset / exact daily suffix start and end / schema checked:
Dry-run byte estimate / maximum bytes billed / authorized operator:
Query version / export completeness / daily-table update timing:
Grouped event-row results / missing-value statuses / unresolved hosts:
This export audit is not a simulation of GA4's hostname filter.

Keep raw URLs, query parameters, personal information and credentials out of
shared notes. Hostname context is not authenticated origin or a fraud verdict.
No Analytics, security or advertising settings are changed by this worksheet.