Digital stopped being a channel.

US digital advertising ended 2025 at $294.6 billion in revenue, up 13.9% year over year (IAB/PwC Internet Advertising Revenue Report FY2025, April 2026). The global reading tells the same story at larger scale: pure-play digital reached 72.9% of total advertising in 2025, or $813.3 billion of global ad revenue (WPP Media, This Year Next Year, December 2025). At that share, traditional media reads as residual inside an addressable framework.

Attention moved first. US adults now spend 3 hours 12 minutes a day with digital video and 2 hours 18 minutes with social platforms, against 1 hour 56 minutes with linear TV and 38 minutes with print and radio combined (eMarketer US Adult Media Time 2026; Nielsen Total Audience Q4 2025). Add digital audio's 1 hour 38 minutes and digital has crossed two-thirds of the US adult media day.

Audio is where the shift looks most complete. 81% of Americans 12 and older, roughly 233 million people, now listen to online audio monthly, an all-time high (Edison Research, The Infinite Dial 2026, March 2026). Reach at that scale is the context for everything that follows: the audience side of the ledger finished its migration before most budgets started theirs.

The planning finding sits underneath those numbers. Digital's share of time and revenue crossed two-thirds (eMarketer, 2026; Nielsen, Q4 2025), yet most brand budgets still treat the 2024 mix as their baseline (MediaPath Research, 2026). The lag compounds. Every quarter the mix moves and the baseline holds, the distance between where audiences spend time and where plans spend money grows.

The headline growth number also hides a restructuring. Commerce and retail media grew at 1.3 times the overall digital rate in 2025 (IAB/PwC, 2026), so the category's internal mix is shifting even where the topline looks familiar. A budget that grows its digital line 13.9% while keeping 2024 proportions still loses position against where the dollars actually moved.

Audio makes the lag concrete. Monthly online audio reach stands at an all-time high (Edison Research, 2026), while ad spend allocation has not closed the gap. Audio is the clearest case of time outrunning price.

The structural conclusion follows. Digital now works as an ecosystem of seven-plus pools: CTV, the open web, retail media, social commerce, AI search, audio and podcasts, DOOH and gaming (MediaPath Research, 2026). Each pool carries its own consumption base, time-spent profile, audience composition, measurability, and fragmentation pattern. One line item cannot govern seven pools that differ on every one of those dimensions, so the plan has to break the digital line down into its parts.

Audiences already operate this way. They move across six to nine channels by default (MediaPath Research, 2026), and identity, signals, and creative travel with the viewer. Most org charts have not caught up. Channel-led teams, channel-led budgets, and channel-led metrics carry a measurable cost in duplicate audiences, weakened attribution, and locked walled-garden pricing, which the report calls a fragmentation tax. Channel-specialist structures cannot price the tax they create.

The convergence carries dates. In April 2025, Walmart Connect opened its Vizio CTV beta, with Vizio's SmartCast OS becoming the CTV inventory and measurement layer for Walmart Connect — retailer transactional data, CTV inventory, and measurement sold as one stack (Walmart press, April 2025). In October 2025, Spotify joined the Amazon DSP off-site roster alongside Netflix, Disney, Warner Bros, Roku, and SiriusXM, opening biddable audio to a walled-garden DSP (Spotify 6-K, October 2025).

In November 2025, the IAB/MRC Attention Measurement Guidelines v1.0 shipped, giving attention metrics a standard defensible at the brief stage (IAB/MRC, November 2025). In February 2026, The Trade Desk launched the Ventura Ecosystem, with OpenAds, OpenPath, UID2, OpenPass, V (formerly VIDAA, with 50 million-plus connected devices), and Nexxen as first partners, built as the connective layer between CTV inventory and identity (The Trade Desk, February 2026). Each event ties together pools that 2022-era plans still hold in separate swim lanes, and the open web does the knitting: it is the identity and measurement layer connecting CTV, retail media, display, open audio, and DOOH (MediaPath Research, 2026).

The report answers with three planning disciplines. The first is measurement-first: set the outcome architecture before deciding which channels carry which dollars, with MMM, incrementality, and attention as the frame. The survey evidence supports the ordering: 46.9% of US marketers rate MMM their most reliable cross-channel measurement approach, against 34.1% for incrementality and 19.4% for last-click MTA (eMarketer/TransUnion, July 2025). MMM is back as the cross-channel anchor for the first time since 2008, because identity fragmentation broke last-touch attribution (MediaPath Research, 2026).

The second is orchestration-led. Audience and creative overlap across the ecosystem is a planning variable, not a reporting artifact. Cross-channel audience deduplication is the new frequency capping: with audiences on six to nine channels, the overlap map decides reach efficiency before the first dollar moves. Deduplicate before you buy.

The third is identity-anchored. UID2, ID5, LiveRamp ATS, and first-party data clean rooms sit in the plan as foundational infrastructure. Google retired ten Privacy Sandbox technologies in October 2025 and third-party cookies remain in Chrome with no choice prompt (Google, October 2025), yet the post-cookie identity stack kept building anyway. The cookie's survival accelerated the rebuild. Identity stack design belongs before the media buy.

Taken together, the frame is short enough to run a planning cycle on: plan to the ecosystem, anchor on the open web, and measure the whole. The State of Digital Media 2026 supplies the channel-by-channel evidence behind each move, with sources named throughout.