What is identity resolution in CTV advertising?
Identity resolution is the process of linking multiple device identifiers — mobile IDFA, GAID, CTV device ID, browser cookie, email hash — to a single person or household profile. In CTV, identity resolution matters because a household may own a Samsung smart TV (TIFA), an Android phone (GAID), and a laptop (cookie) — and without linking these, the same household receives the same ad independently on each device, preventing cross-device frequency management and accurate reach measurement. Identity resolution uses deterministic matching (known links, like email login across devices) and probabilistic matching (IP address, Wi-Fi network, device usage timing) to build household graphs.
Why is CTV identity resolution particularly difficult in India?
India CTV identity resolution faces four compounding challenges: (1) No dominant cross-device ID — unlike the US where Unified ID 2.0 (UID2) is gaining traction as a shared identity standard, India has no widely adopted equivalent for CTV. (2) Fragmented device OS ecosystem — Android TV (GAID), Samsung Tizen (TIFA), Amazon Fire OS (AFAI), and LG webOS (LGUDID) each use different ID formats that do not share a common namespace. (3) Jio household complexity — a single Jio SIM or fibre connection may serve multiple devices with shared IP addresses (CGNAT), making IP-based probabilistic matching unreliable in urban Indian households. (4) DPDPA consent — India’s Digital Personal Data Protection Act requires explicit user consent for cross-device data linking, which limits the data available for identity graph construction.
What identity resolution solutions work for India CTV?
Current practical approaches for India CTV identity resolution: (1) Publisher first-party login graphs — JioHotstar, Sony LIV, and Zee5 have logged-in user bases that allow them to link a viewer’s CTV, mobile, and web behaviour within their own platform. Cross-publisher linking is not available. (2) DSP household IP matching — DV360 and The Trade Desk use IP address and Wi-Fi network signals to probabilistically link CTV and mobile devices within the same household. Accuracy is 60–75% in urban India; lower in areas with carrier-grade NAT. (3) UID2 / RampID adoption — early-stage in India CTV; The Trade Desk is seeding UID2 adoption with Indian publishers, but scale is limited as of 2026. Plan for incomplete identity resolution and account for it when interpreting cross-device reach reports.