Moments-Based Playbook: How To Scale Personalization With Modular Content

Most marketers know exactly what they’re aiming for: content that feels personal, timely, and unmistakably relevant. They’ve got the data. They’ve mapped out dynamic journeys. The strategy is sound. But there’s still a missing link, and it’s holding personalization back.

The culprit is content personalization. While the rest of the martech stack has evolved to support real-time, adaptive experiences, content remains stuck in a campaign-era mindset — rebuilt from scratch, hard-coded for one channel, and siloed from the systems driving audience insights. The result is a personalization ceiling: You can’t scale what you can’t systematize.

Betty Rangel, Senior Product Marketing Manager at Movable Ink, joined Iterable to unpack how marketers, CRM teams, and product-led growth leaders can evolve from static campaigns to a living system that adapts in real time. 

The Personalization Paradox: When Better Ideas Create Bigger Bottlenecks

The real blocker to personalization isn’t a lack of imagination. It’s the systems (or lack thereof) that support it. As Rangel explains, marketers aren’t short on ideas. They understand the power of tailoring content to behaviors, demographics, preferences, real-time signals like weather or location, and even shifting inventory levels. The vision is there.

But every new layer of personalization adds exponential complexity. Each variable (device type, product affinity, time of day) requires another round of creative tweaks. Before long, teams are drowning in manual rebuilds: new layouts, new variants, and new versions for every channel, segment, and trigger.

It’s no wonder content operations start to buckle. According to Gartner, 65% of marketers say they’re overwhelmed by the sheer volume of content needed to support personalization. And 62% of marketing leaders admit they simply can’t scale production fast enough to match the segmentation their strategies demand. This is the personalization paradox: the more relevant experiences teams aim to deliver, the more their traditional, campaign-based content systems hold them back.

Modular Content 101: Your Brand’s Capsule Closet

The solution to the personalization paradox isn’t more content—it’s a modular content system.

Modular content is a way of scaling personalization by assembling messages from reusable content blocks instead of rebuilding entire campaigns from scratch. Rather than creating new emails or messages for every segment and channel, teams design flexible components once and dynamically combine them based on customer data and context.

Think of it like a well-curated wardrobe. You don’t buy a new outfit every time you go out. You mix and match core pieces based on the season, the setting, or the mood. A blazer here, a favorite pair of jeans there, maybe a statement scarf when it fits.

Modular content works the same way:

• Your “wardrobe” is a curated collection of reusable, on-brand content pieces you can rely on again and again.
• Data is the stylist, reading the room—who the customer is, what they’re doing, and what they need in the moment.
• Iterable is the closet organizer and outfit planner, deciding which pieces are appropriate for the occasion, the timing, and the channel—workday vs. weekend, email vs. mobile.
• Movable Ink is the tailor, adjusting the fit in real time—swapping colors, styles, and details so the outfit looks like it was made just for that person when they open the message.

In practice, this changes the personalization game for virtually every industry:

• Retail teams can reuse product tiles, recommendation rows, and promotional banners that adjust to inventory, location, or browsing behavior. 
• Fintech brands can swap in account summaries, progress indicators, or educational tips based on lifecycle stage and engagement signals. 
• Media and entertainment companies can dynamically surface “continue watching” modules, trending content, or editorial picks tailored to each user’s viewing habits.

By standardizing these building blocks, teams reduce creative overhead, maintain consistency across channels, and finally unlock personalization that scales with the moment—rather than fighting against it.

Three Foundations That Make Scalable Content Personalization Possible

To make modular content work at scale, three operational foundations need to be in place:

1. Asset Management

If you can’t find it, you can’t scale it. Too often, creative assets are scattered across folders, buried in version history, or duplicated in ways that drain productivity. Modular content starts with consolidating your creative into one organized, searchable home. 

Iterable’s Catalog and Movable Ink’s asset management tools (including the Content Connector) bring order to the chaos, making sure every team has fast, frictionless access to up-to-date assets.

2. Reusable Building Blocks

Scaling personalization doesn’t mean reinventing the wheel for every email, push notification, or landing page. Instead of designing full communications from scratch, create reusable components that can be mixed, matched, and repurposed across journeys and channels.

High-impact modular blocks often include:

• Hero images
• Product tiles or recommendation rows
• CTA modules
• Pricing panels
• Headers and footers

With Iterable features like Templates, Snippets, Catalog, and APIs, you can assemble and adapt these blocks programmatically without sacrificing brand consistency or design integrity.

3. Taxonomy and Structure

Behind every scalable system is a framework that tells it how to work. Taxonomy is that hidden engine. Metadata, naming conventions, tagging, and classification make it possible for automation and AI to understand which content is right for which user, channel, and moment.

When structured correctly, your system can dynamically select and update the right content based on context while feeding performance data back into smarter reporting and experimentation. Without structure, personalization is manual. With it, it’s automated and adaptive.

Aligning Content, Customer, and Business Need

Modularity is a powerful enabler. But on its own, it’s not enough. Real personalization doesn’t stop at assembling flexible blocks. It’s about choosing the right content, for the right person, at the right time, based on what’s happening in their world and in your business.

That’s the power of context alignment: where modularity meets meaning. Effective personalization draws on a full spectrum of signals:

• Contextual data: device type, time of day, location, or even current weather conditions
• Behavioral data: recent browses, past purchases, engagement recency, or category interests
• Demographic data: age, region, language, or account type
• Inferred preferences: engagement patterns like preferred channels or times to interact—often revealed through tools like Iterable’s Send Time Optimization and Channel Optimization

But recognizing signals is only the first step. To turn those signals into action, brands need context alignment: the ability to match the right piece of content to a user’s real-time situation and intent, while accounting for brand priorities (like inventory status, promotions, seasonality, and strategic initiatives).

True context alignment happens when three layers click into place:

• The right content block (a promo tile, hero image, or product grid)
• The right data signal (someone browsed but didn’t convert)
• The right timing (moments when users are most receptive or inventory is shifting)

Consider a quick-service restaurant brand. With location and weather data, they can show a hot coffee promotion in snowy Indianapolis and an iced drink offer in sunny Miami, all within the same campaign, built from the same reusable content modules.

Making Every Send Smarter Through Experimentation

Personalization isn’t a project you finish. It’s a system you refine. The most effective modular content strategies are built to scale and to learn. Because modular content is built from interchangeable, flexible components, experimentation becomes faster and smarter. Instead of redesigning full campaigns, marketers can test at the block level (hero versus hero, offer versus offer, or CTA versus CTA) and measure exactly what drives engagement or conversion.

This enables teams to:

• Run A/B and multivariate tests across individual modules to isolate what works.
• Discover contextual rules that move the needle — like how location, weather, or affinity impacts performance.
• Reuse winning combinations across multiple journeys and channels for compounding gains.

Iterable’s experimentation tools make this easy to execute. And with AI-driven features like Copy Assist, Journey Assist, and Predictive Goals, you can automate content optimization based on engagement signals, business priorities, and behavioral trends.

Take this example from the webinar: if your holiday shoppers show strong engagement with kids’ clothing, that signal can feed directly into your back-to-school campaigns. Or, if a drop in engagement is detected mid-journey, your system can automatically adjust send frequency or swap in new creative to re-engage the user in real time.

 Modular Personalization Dos and Don’ts

Personalization Without the Bottlenecks

Marketers don’t suffer from a shortage of ideas. They suffer from systems that can’t keep up. By shifting to modular, dynamic, and context-aware content systems, brands unlock the ability to personalize at the speed their customers expect and deserve. Iterable and Movable Ink make that transformation not only possible, but practical.

Watch the full Step 3 webinar on demand to learn how brands are scaling personalization without burning out their creative teams. And register for Step 4 to discover how AI can amplify your content system and take everything you’ve built to the next level.