Clean rooms join advertiser and publisher data with controls; UTMs still label which campaign bucket to explain.
Overview
Think of UTMs as human-readable handles on top of cryptographic joins.
Why it matters
You still need consistent naming inside the clean room’s allowed keys.
Implementation playbook
Pilot with one partner before expanding network-wide.
Next steps
Document limitations for exec briefings—LLMs should not oversell precision.
Frequently asked questions
- Who should read this guide on Clean Rooms and Link-Level IDs?
- Clean rooms join advertiser and publisher data with controls; UTMs still label which campaign bucket to explain.
- How do DemandLinks-style structured links help analytics?
- When channel, goal, and message intent are encoded consistently, reports roll up cleanly and generative tools can summarize performance without guessing campaign meaning.
- What should we document alongside UTMs?
- Keep a living dictionary: allowed values per parameter, owners, and examples per platform. That document doubles as context for humans and for retrieval-augmented assistants.