SAN JUAN, Puerto Rico – At a time when marketing tech stacks resemble overstuffed carry-ons, Maggie Summers, head of activation at Dentsu X, has a simple suggestion: stop collecting tools and start making decisions.
Speaking with Beet.TV contributor David Kaplan at the Beet Retreat San Juan, Summers said many bloated systems are built for execution rather than insight.
“Most tech stacks are complex because they are focused on execution instead of focused on making decisions,” she said, adding that marketers should force their systems to answer sharper questions like who the customer is, what decision to make and what was learned. In other words, fewer dashboards, more judgment.
Durable audiences, not disposable segments
Summers also took aim at one of advertising’s favorite habits, endlessly slicing audiences into segments that expire faster than a hotel key card. The fix, she said, is an identity-first approach.
“In a fragmented ecosystem, how we ensure that we’re building audiences that are durable is that it’s rooted in identity,” she said.
Rather than chasing channels or tactics, Dentsu X focuses on what she called an “identity spine” that ingests signals over time.
The test is straightforward and slightly humbling: “If you can’t replicate or measure the audience you’ve activated six months later, it’s not a durable audience.”
From last-mile delivery to catalyst engine
The role of activation itself is getting a promotion. What used to be a handoff point at the end of a media plan is now expected to think, learn and adapt in real time. Summers described the shift with a mix of enthusiasm and mild disbelief.
Activation, she said, is no longer just pushing buttons in platforms. It is “much more of a catalyst engine,” where teams must interpret signals, make decisions and configure systems to improve outcomes. That means fewer channel specialists and more hybrid thinkers who understand identity, measurement and how everything connects without breaking.
Privacy chaos creates a new currency
With signal loss and privacy rules scrambling the old targeting playbook, Summers sees identity as the closest thing to a stable currency. She acknowledged the messy reality of walled gardens and imperfect measurement, but said a consistent source of truth still pays dividends.
Even if results cannot be measured perfectly across every platform, brands can “really experiment and learn a lot” within a controlled ecosystem grounded in identity-based audiences. Translation: you may not see everything, but you can still learn something useful.
Agents arrive and politely threaten to break everything
Looking ahead, Summers pointed to AI agents as the trend that will separate winners from everyone else nervously refreshing their dashboards. She didn’t sugarcoat the transition.
“2026 being the year of destruction,” she said, quickly clarifying that this means breaking old processes and rebuilding with agents at the center. The key is not deploying the most agents, but deploying the right ones.
“The ones who win are gonna be the ones that have deployed the agents to make the decisions that matter,” she said.
It is a comforting thought for marketers everywhere who suspected that adding more tools was not the answer and now have permission to tear a few out.
You’re watching coverage from Beet Retreat San Juan 2026, presented by Alliant and TransUnion. For more videos from this series, please visit this page.
