Overview
Ozone is a digital advertising platform created by a consortium of major UK and European publishers (including News UK, The Guardian, and Reach) that enables advertisers to buy premium display and video inventory across participating publisher websites. Ozone's JavaScript tags facilitate audience targeting, impression tracking, and conversion measurement within its publisher network. The platform positions itself as a privacy-first alternative to walled garden advertising platforms, with a focus on first-party data and contextual targeting. Ozone tags are commonly found on UK media websites and on advertiser sites that use Ozone for campaign measurement and attribution.
Detection Capabilities
- Signature count
- 2
- Detection methods
- network
Performance Impact
Performance Impact
- Requests per page
- 2
Common Mistakes
- 1 Assuming that Ozone's privacy-first positioning means its tags do not require consent - the platform still collects personal data for audience targeting and impression tracking
- 2 Not including Ozone tags in the CMP advertising category because they are perceived as publisher infrastructure rather than advertiser tracking
- 3 Failing to assess the data flows between Ozone and participating publishers, which may involve sharing audience segment data across the consortium
- 4 Deploying Ozone conversion tracking without understanding the relationship between Ozone's first-party identifiers and publisher-side data
- 5 Not auditing Ozone tags that appear through programmatic supply chain relationships rather than direct advertiser deployment
Compliance Considerations
Ozone tags collect audience and impression data to facilitate advertising across its publisher network. Under GDPR and the UK Data Protection Act 2018, this constitutes personal data processing requiring advertising consent. Ozone processes data in the UK and EU, which avoids transatlantic transfer complications. The platform's publisher consortium model means data controllership arrangements may be complex - organisations should clarify whether Ozone acts as a processor, joint controller, or independent controller for different data processing activities. The tag should be categorised under advertising consent in the CMP and blocked until explicit consent is granted. Ozone's compliance with the IAB Transparency and Consent Framework should be verified as part of the vendor assessment.
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