CTV Advertising for Performance Marketers: How to Buy It, Measure It and Pair It with Spotify

Connected TV (CTV) used to sit firmly in the brand-awareness column: a line item you justified with reach and recall, not revenue. That has changed. CTV inventory is now addressable, biddable and measurable enough to run like any other performance channel. The brands winning with it stopped treating it as television and started treating it as broadcast bought like performance.

What is CTV advertising?

CTV advertising is video served through internet-connected televisions: streaming apps, smart-TV operating systems and devices like Roku, Fire TV and Apple TV. Unlike linear TV, each impression goes to a specific household and can carry a measurable event. That is what makes performance buying possible. You'll also see the term OTT (over-the-top), which covers the same streaming content on any device. CTV is the big-screen slice of it.

Why should performance marketers care about CTV?

Three shifts moved CTV into the performance conversation:

• Addressable targeting down to the household, using first-party and partner data instead of programme demographics.
• Programmatic buying through the same demand-side platforms you already use for display and video, with the same frequency and brand-safety controls.
• Viewing moving to streaming, so the inventory now sits where the audience actually is.

The result is premium, full-screen, sound-on inventory you can buy on outcomes instead of gross rating points.

How do you buy CTV like a performance channel?

The discipline is the same one we apply to every channel: buy outcomes, not impressions. In practice that means:

• Instrument attribution first. Set up a clean measurement path, with pixel or server-side events plus incrementality testing, before you spend, not after.
• Match audiences to real signals. Use first-party data and suppression lists so you aren't paying to reach existing customers or the wrong households.
• Control the inventory. Curated private marketplaces and direct publisher deals beat open-exchange CTV for brand safety and fraud control.
• Measure to a downstream action. Site visits, app installs or conversions, held against a holdout, tell you whether the spend paid back.

How do you measure CTV?

Nobody clicks a TV, so CTV measurement works differently from search or social. There are three layers, and you want all of them:

• Cross-device matching. Household exposure is matched, in a privacy-safe way, to the phones and laptops in that household, then to site visits and conversions. This gives you a directional cost per visit and per conversion.
• Search and direct lift. Branded search volume and direct traffic should rise in the regions and hours where CTV runs. If they don't, the creative or targeting isn't working.
• Incrementality. Geo holdouts or matched-market tests compare regions that saw the campaign with regions that didn't. This is the number that settles budget arguments.

Can Spotify work alongside CTV?

Yes, and it is one of the most efficient pairings in broadcast. CTV reaches people in the living room with full-screen video. Spotify and podcast audio reach the same people when the screen is off: on the commute, at the gym, at their desk. Together they cover far more of the day than either channel alone.

Three things make the pairing work:

• One message, two formats. Re-cut the CTV soundtrack and voiceover into a 30-second audio spot. The audio then cues the memory of the TV ad, and production costs stay low.
• Shared audiences. Build both buys from the same first-party and demographic segments, and manage frequency across the two, so you're adding reach rather than doubling up on the same people.
• One measurement plan. Run both against the same geo holdout so you can read the combined lift, instead of each platform claiming the same conversions.

Where does DOOH video fit?

Digital out-of-home (DOOH) video takes the same creative onto screens in stations, malls and city centres. Bought programmatically, it can be triggered by location, time of day and audience data, and measured with the same mobile-matching approach as CTV. Used alongside CTV and audio, it puts the message close to where the purchase decision actually happens.

What are the pitfalls to avoid?

CTV fraud is real, and open exchanges are where it concentrates. Misdeclared inventory and bot traffic can quietly eat a budget. Frequency also runs away fast on CTV: without caps, the same household sees your ad far too often. And attribution windows matter. CTV often assists rather than closes, so a last-click model will undervalue it and a naive view-through model will overcredit it. The fix is incrementality, not a prettier dashboard.

Regulated categories need extra care. For gambling brands in the UK, that means age-gated audiences, CAP-compliant creative, and inventory where under-18s are a very small share of viewers.

How we buy CTV and in-app media: AgentTIM

Everything above needs a buying seat that can actually execute it: transparent inventory, hard age controls, and bidding tied to real conversion events. That's why we built AgentTIM, That's It Media's own AI-powered media-buying system.

AgentTIM specialises in in-app programmatic, the inventory most brands still haven't touched, and the same seat buys CTV and wider programmatic media, so the big screen and the phone run from one plan. It pulls in MMP events and inventory signals to score every placement on its likelihood to convert, then moves budget towards ROAS rather than cheap CPMs. Every impression is reported at placement level. For regulated brands, compliance is built into the buy: 18+ category whitelisting, an age-inference layer that risk-scores every app before it's bought, and market-specific advertising rules applied by licence and geo. It's built on more than 12 years and €50M+ of performance buying for tier-one casino and sportsbook brands. It's the engine behind the CTV-to-mobile journeys in our retargeting and performance programmatic work.

Where does CTV fit in a media plan?

CTV rarely works as a standalone channel. It performs best inside a coordinated paid-media plan, priming demand that your search and social then capture. It is reinforced by cross-screen retargeting and a landing experience engineered to convert. Bought that way, with measurement underneath it, CTV stops being a brand indulgence and starts being an acquisition channel that pays back.