Digital ad spending kept climbing through the pandemic, and the money moved with it. Connected TV took the biggest jump, voice assistants crossed from novelty to a real buying channel, and programmatic buying tightened its grip on display ads. According to industry coverage, these shifts accelerated well past 2020 forecasts.
The story isn't just about new gadgets. It's about how brands now reach people who rarely sit in front of a TV at a scheduled hour, and how software gets to act on first-party data instead.
Quick take
- Programmatic was projected to account for 88.2 percent of digital display ad revenue by the end of 2021.
- Connected TV ad investment hit around $9 billion during the pandemic surge.
- Voice buying was on track to grow from a value toward $40 billion by 2022.
- Omnichannel campaigns combining four or more channels outperformed single-channel ones by 300 percent.
Where the spend is going
Connected TV turned into the fastest-growing ad channel during lockdowns. People binged shows, advertisers followed, and dynamic ad insertion let brands swap creatives in live or on-demand streams without re-uploading. That meant lower latency for viewers and better reporting for buyers. CTV wasn't just an extension of old TV budgets; it pulled from display and pulled in social media with fresh budget lines. Audio advertising followed the same logic, with programmatic pipes now handling publishers, creators and podcast networks at the same scale as banner inventory.
Why this matters
If you're a marketer, the math has flipped. A campaign that ignores CTV and voice in 2022 leaves reach on the table, particularly in markets where cord-cutting has gutted linear TV viewership. Programmatic lets small teams act like media buyers at the scale of an ad agency, with first-party data feeding creative decisions in near real time. The trade-off is a heavier reliance on platform-side measurement, which is exactly the spot where ad fraud and brand safety still bite.
For everyday users, the result is more relevant ads in streaming apps and on smart speakers, but also more tracking across the audio surface. The same tech that personalizes a recipe ad after a smart-speaker cooking query also logs that query for the brand.
A practical example for marketers
Say you run a regional coffee chain and want to reach morning commuters. A pre-pandemic plan might have leaned on radio and a print insert. The 2021 playbook looks like: dynamic DOOH screens outside train stations that react to real-time crowd density, plus a programmatic CTV buy for at-home early risers, plus a sponsored voice skill that surfaces your nearest location. Each channel talks to the others through first-party data piped through programmatic pipes. The test budget is small, the measurement loop is tight, and you kill what doesn't convert within a week.
What to watch next
Watch the rise of voice advertising as smart speakers get to critical mass in homes. Also watch whether CTV ad inventories can keep their measurability low as more money floods in. The bigger fight is over addressability on the open web as cookies get phased out.
Key takeaways
- Connected TV became the fastest-growing ad channel during pandemic lockdowns, pulling spend from display and social.
- Programmatic was projected to drive 88.2 percent of digital display ad revenue by the end of 2021.
- Voice advertising was on track to approach $40 billion by 2022, turning smart speakers into a real buying channel.
- Omnichannel campaigns using four or more channels outperformed single-channel campaigns by 300 percent.
- Programmatic pipes now handle audio publishers, creators, and podcast networks at the same scale as banner inventory.
Frequently asked questions
What was the biggest ad tech shift in 2021?
Connected TV ad spend surged during the pandemic to around $9 billion, making it the fastest-growing ad channel as cord-cutting cut into linear TV viewership.
How big was programmatic advertising by the end of 2021?
Programmatic was projected to account for 88.2 percent of digital display ad revenue by the end of 2021.
Did voice search become a real ad channel in 2021?
Yes. Voice buying was on track to grow from its 2021 baseline toward $40 billion by 2022, turning smart speakers from a novelty into a buying channel.
Do omnichannel ad campaigns really work better?
According to industry figures cited in the article, omnichannel campaigns combining four or more channels outperformed single-channel ones by 300 percent.
What is the trade-off with programmatic and first-party data?
Marketers can run near real-time, data-driven campaigns, but they rely more on platform-side measurement, which is where ad fraud and brand safety issues still bite.