Second screen advertising on CTV uses the TV as the first screen (awareness, brand message, scale) and the mobile phone as the second screen (interaction, response, conversion). The concept acknowledges a universal truth in India: while someone is watching TV, their phone is almost certainly in their hand or within arm's reach. The TV reaches a household; the second screen reaches the individual. Second screen strategies turn this passive co-presence into an active marketing channel.
The second screen opportunity in India
India has one of the highest second-screen co-viewing rates in the world. Smartphone penetration in urban India is above 80%, and mobile data is cheap enough that phone-in-hand during TV watching is the norm rather than the exception. Research from Hotstar and industry studies consistently show that 60–75% of India CTV viewers are using a second screen while watching.
This creates a strategic opportunity: the TV ad's job is to create strong enough interest that the viewer picks up their already-in-hand phone and engages further. The barrier to second screen action is lower in India than in most developed markets because the phone is already active.
Second screen activation methods
QR codes: The most commonly deployed second screen trigger. The TV ad shows a QR code and the viewer scans it on their phone, arriving at a mobile destination. Zero platform dependency. Works on any CTV platform, any device. See the QR code ads article for detail on scan rates and creative best practices.
SMS / WhatsApp trigger: The TV ad shows a short code or WhatsApp number — "WhatsApp 'OFFER' to 12345" or "SMS 'BRAND' to [number]." The viewer sends a message and receives a response with the offer, link, or product information. This is an established India marketing channel that adapts naturally to CTV. It does not require any technical platform integration — the trigger is the viewer's own messaging app.
App push notifications (platform-linked): For streaming platforms with mobile apps (JioCinema, Hotstar), a CTV ad can be paired with a push notification to the mobile app at the same time. A viewer watching JioCinema on TV sees an ad; the same viewer's phone receives a related notification from the JioCinema app with a product link or offer. This requires platform integration and a user who has the app installed — Amazon has built this capability with Fire TV and the Amazon app.
Social media bridges: The TV ad includes a branded hashtag or asks viewers to search for a specific term. Engagement on social or in a search engine becomes the second screen action. This is awareness-level rather than response-level but measurable via social listening and search volume uplift post-campaign.
Measuring second screen effectiveness
Second screen campaigns require multi-touch attribution — connecting the TV impression to the mobile action. The QR scan is the cleanest signal: a scan confirms a specific viewer responded to a specific ad impression. For SMS/WhatsApp triggers, message volume against campaign flight dates provides a clear response signal. App notification opens link directly to the campaign via UTM parameters.
The challenge is attribution quality: a viewer who scans a QR code 20 minutes after seeing the ad (during an ad break earlier in the programme) may not be captured in real-time tracking. Lookback windows of 15–30 minutes for QR attribution and 24–48 hours for SMS response attribution are industry practice for CTV second screen measurement.
India second screen best practices
WhatsApp is the most-used messaging app in India, making WhatsApp-triggered second screen campaigns uniquely accessible. A CTV ad with a WhatsApp trigger reaches viewers through a channel they already trust and use daily — the friction is minimal because they are not downloading an app or creating an account. WhatsApp Business API integration for responding to second screen triggers is well-established in India's marketing ecosystem.
For e-commerce advertisers, the QR-to-cart route (QR code on CTV ad that deep-links to a product cart on Amazon, Flipkart, or brand app) is the highest-intent second screen path. The viewer has expressed product interest by scanning; the destination should require minimal steps to purchase.