Nielsen measures CTV audiences through a hybrid methodology combining its traditional panel households with digital census data. In the US, Nielsen ONE integrates its metered panel (households with installed Nielsen meters on all their TV and digital devices) with streaming platform census data to produce cross-media audience estimates. The panel provides the demographic calibration — who is actually watching — while census data from streaming platforms provides the scale. For each viewing session, Nielsen can say both how many people watched and who demographically they were.
For India, Nielsen's CTV measurement infrastructure is significantly less developed than its US offering. BARC India (Broadcast Audience Research Council) operates the primary TV audience measurement panel in India — Nielsen is a minority stakeholder in BARC. BARC's panel covers traditional linear TV extensively but has limited ability to measure CTV and OTT streaming separately from panel households' TV sets. Nielsen India offers digital audience measurement through its Digital Content Ratings product, which covers some OTT platforms, but this is separate from the BARC linear panel and not a unified cross-media measurement system. For India CTV planners, the honest answer is that no Nielsen-equivalent unified CTV measurement exists in India in 2026. What exists: platform-self-reported data, BARC's partial OTT measurement, and third-party digital verification (IAS, DoubleVerify) for impression quality — not audience composition.
Full guide
For a complete explanation, read: How Nielsen measures CTV audiences: panel, census, and what it means for India