Some advertisers and content owners are interested in understanding how their content is performing on YouTube and YouTube TV.
To provide this info, YouTube partners with Nielsen to measure content performance. Nielsen TV market research measures your viewing behaviour.
- Learn about how info is collected and used or change your preferences on the Nielsen website.
- Learn about how usage is measured and our corresponding privacy policy in the YouTube Paid Terms of Service.
Follow the steps below to opt out or check your opt-out status, according to Nielsen's website and policies:
You can opt out of ads personalisation within your Android device's settings page. To opt out, tap Settings 
Once you've opted out, your viewer demographic data will no longer be included in Nielsen TV measurement. We may communicate regularly with Nielsen to confirm member opt-out status.
TV devices
You can opt out of ads personalisation by visiting Google Ads settings.