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12 Marketing Strategy Case Studies from Leading Brands

12 Marketing Strategy Case Studies from Leading Brands

Vivaldi has built marketing strategies for AT&T, Kellogg’s, Coca-Cola, UBS, Sephora, and Deutsche Telekom, among others. The 12 case studies below cover marketing mix modeling, spend optimization, capability transformation, and measurement systems. They include the modeling that confirmed advertising as a cost-competitive acquisition channel for AT&T, the analysis that moved more than $75 million of Kellogg’s coupon spend to higher-ROI channels, and the Sephora holiday program that grew Twitter followers 46% and Facebook followers 53%. Each entry names the challenge, the strategic move, and what it delivered.

Search for marketing strategy case studies and you will mostly find campaign recaps: a clever ad, a viral moment, a metric with no baseline. This page holds itself to a different standard. Every engagement below is Vivaldi’s own client work, and every one is strategy rather than tactics. The question in each case was not what to say in the next campaign. It was where the money should go, how the marketing function should be built, and how anyone would know it was working.

That distinction has a price tag. A weak campaign wastes a quarter’s budget. A weak strategy misallocates spend for years, and no one notices because nobody built the instrument that would show it. Most of the cases below start exactly there: a large budget, inherited habits, and no rigorous answer to what the money actually earns.

Auditing where your marketing money actually works? Explore Vivaldi’s marketing strategy practice, or contact us to find out what your spend is really buying.

What makes a marketing strategy worth the name

Three disciplines repeat in this list. First, spend is interrogated before it is defended; Kellogg’s coupon programs ran on convention for decades until a breakeven curve showed most of them losing money. Second, measurement is built to change decisions, not to decorate reports; AT&T’s mix modeling and UBS’s global dashboard exist to move budgets. Third, the organization is treated as part of the strategy; Assurant’s transformation started with capabilities and ended with a CMO. Hold each case below against those three disciplines as you read.

Marketing strategy case studies

1. AT&T: proving what advertising actually earns

AT&T needed to know whether advertising spend returned as much as direct customer acquisition, with hundreds of millions of dollars riding on the answer. Vivaldi built a marketing mix model that attributed acquisition outcomes to specific media channels, then extended the methodology to AT&T’s DSL business to help the company make more informed strategic decisions across the broader company’s marketing strategy. The modeling confirmed advertising as a cost-competitive acquisition channel with a dual payoff, short-term conversion plus long-term brand equity, giving AT&T the confidence to reallocate investment while clarifying KPIs such as website traffic or organic traffic. Read the AT&T case study

2. Kellogg’s: the $75 million coupon audit

Kellogg’s marketing budget leaned heavily on coupon programs, and Vivaldi reviewed them as part of a broader marketing plan tied to core business goals and business objectives because nobody had rigorous evidence that they paid back. Vivaldi’s breakeven curve modeling analyzed coupon profitability across the portfolio and revealed that most programs failed to generate enough incremental volume to cover the discount, helping identify opportunities for reinvestment. The result: more than $75 million reallocated from unprofitable coupons to higher-ROI channels without reducing consumer reach. Read the Kellogg’s case study

3. Sephora: turning holiday shoppers into advocates

Sephora wanted to grow its social following during the most competitive retail season of the year, and standard promotion was not going to do it. Vivaldi created the “Sephora Clause” campaign, a Twitter-based experience that let users unlock personalized holiday wish lists and rewarded sharing behavior, designed to capture attention during peak holiday noise on social media platforms. It delivered 46% Twitter follower growth, 53% Facebook follower growth, and more than 107,000 page visitors, a new benchmark for social engagement in luxury retail, amplified through shareable social media posts to deepen customer engagement. Read the Sephora case study

4. Coca-Cola: one standard for a global marketing function

Coca-Cola’s marketing organization ran with wide variation in practices, governance, and capability across markets, which put consistent returns on global brand investment at risk. Vivaldi built a marketing excellence framework defining shared standards, governance models, and capability priorities, backed by centers of excellence and a training program, and established the key elements of an effective marketing strategy across regions. The work aligned Coca-Cola’s worldwide marketing function around shared standards and disciplines, improving consistency of brand execution globally while strengthening consistent messaging and helping build brand loyalty worldwide. Read the Coca-Cola case study

5. Assurant: from support function to strategic driver

Assurant lacked a comprehensive plan for how the marketing team would support growth, so marketing operated as tactical support, with no CMO and no clear mandate to drive growth. Over two years, Vivaldi led a transformation program that built consumer-centric capabilities, redesigned the organization, and established a formal CMO role, creating a more effective plan for aligning marketing efforts with the company’s business objectives. Marketing was elevated from a support function to a strategic business driver, with the new CMO role institutionalizing that shift. Read the Assurant case study

6. UBS: a single view of marketing’s contribution

UBS invested in events, media, digital marketing, and CRM, and made decisions about each in silos because no unified measurement existed. Vivaldi built a globally scalable brand marketing dashboard that used data analytics and analytics tools to gather data across every major touchpoint into one view of brand performance against business metrics. For the first time, UBS was able to quantify marketing’s contribution to business results, turning investment debates into data-driven decisions, with unified reporting helping identify opportunities and support faster strategic decisions. Read the UBS case study

7. Cognizant: thought leadership that speaks to the buyer’s problem

Cognizant needed to stand apart from similar companies like Accenture, Infosys, and TCS by moving beyond generic technology narratives and defining its target market more clearly as enterprise buyers rather than broad CXO audiences. Vivaldi reframed Cognizant’s target enterprise clients as the target audience in a business-to-business context, then developed six core narratives grounded in their specific pain points; this clarified ideal customers and helped segment audiences more precisely around buyer needs. The framework, built from an audience-based understanding of those pain points rather than generic technology themes, improved engagement across Cognizant’s thought leadership content and made content creation more relevant for potential customers in a business-to-business sale. Read the Cognizant case study

8. Vanguard: brand intelligence as a standing capability

Vanguard needed continuous insight into how investors perceived the brand, not a one-off study that would be stale within a year. Vivaldi established a long-running brand health program tracking investor perceptions, consumer behavior, messaging effectiveness, and conversion drivers over time, helping track shifts in customer preferences and customer behavior over time. The multi-year measurement system directly informed investor conversion strategy and communication planning, protecting the brand promise in a market where trust is the primary competitive asset—for example, 91% of 18–34-year-olds trust online reviews as much as personal recommendations. Read the Vanguard case study

9. Edgewell: closing the capability gaps behind inconsistent performance

Edgewell’s marketing performance varied widely across markets and categories, with capability gaps and inconsistent processes underneath, and the review also considered market changes that can disrupt performance across categories and regions. Vivaldi assessed the function across processes, organization, agency relationships, and performance management in a way that functioned like a SWOT analysis to identify gaps, then built a framework for operating model enhancement with implementation support. Edgewell gained a marketing effectiveness framework that improved efficiency metrics and reduced capability gaps across markets. Read the Edgewell case study

10. Deutsche Telekom: one read on brand performance everywhere

Deutsche Telekom operated across many markets and needed a consistent way to compare how its brand was performing in each of them when entering or managing a new market, while supporting market research on brand performance. Vivaldi built a brand measurement system that gave the company a single view of brand performance across markets and an actionable plan for comparing markets and adapting to the wider marketing landscape. Read the Deutsche Telekom case study

11. World Gold Council: a unified global voice for gold

The World Gold Council’s regional offices ran divergent communication strategies, diluting every effort to position gold as a brand. Vivaldi, led by branding expert John Diefenbach, built the strategy around gold’s role as a medium of connection across cultures and generations, developing a global communications platform centered on connectivity and creating a successful marketing strategy for presenting gold like a product or service in a consistent way across regions, while giving regional offices a clear unique value proposition that could be expressed consistently across markets. The positioning evolved into the “Speak with Gold” campaign, deployed across international markets as one unified voice, a great strategy because it gave regional teams one shared voice without losing local relevance. Read the World Gold Council case study

12. BayWa: a blueprint for marketing after rapid growth

BayWa’s growth had outrun its marketing governance, making it harder to keep marketing goals aligned across regions and making it necessary to create a marketing blueprint after growth made alignment harder. Vivaldi designed a global marketing blueprint that translated marketing objectives into a direct, actionable plan for regional teams while staying adaptable to local contexts, paired with an internal engagement program to unify leadership. Teams aligned under a “One BayWa” vision that restored clarity, efficiency, and consistency across regions, leading to clearer execution across the company’s marketing tactics. Read the BayWa case study

More marketing strategy work

The archive runs deeper than any list of 12, spanning several of the most effective marketing strategies beyond the featured cases. Across the archive, you can also see channels like search engine optimization, Google Ads, influencer marketing, email campaigns, direct mail campaigns, and video marketing, with search engine optimization seo often supported by keyword research to generate leads and turn interest into qualified leads. Further marketing strategy and marketing campaigns from Vivaldi’s case study library:

Conclusion

The twelve cases above treat marketing as an investment portfolio, not a calendar of activity. AT&T’s mix modeling settled an argument about advertising efficiency with evidence. Kellogg’s moved more than $75 million out of coupons that a breakeven curve proved unprofitable. Sephora’s holiday program earned its social growth because the strategy came before the content. Marketing strategy, done properly, is the discipline of knowing which half of the budget works and having the numbers to defend the reallocation.

Somewhere in your budget is a Kellogg’s-sized reallocation waiting for evidence. Contact Vivaldi, and we will help you find it.

Brand Strategy

Frequently asked questions

What is marketing mix modeling and when is it worth doing?

Marketing mix modeling uses statistical analysis to attribute business outcomes to specific marketing channels and spend levels. It is worth doing when budgets are large enough that misallocation costs more than the modeling, as at AT&T, where the analysis settled whether advertising earned its keep against direct acquisition and revealed a second payoff in long-term brand equity.

 

 

How do you audit marketing spend effectiveness?

Start with the largest line items and test each against the incremental profit it generates, not the activity it produces, especially since a marketing budget can vary widely and may reach up to 50% of total budget, raising the cost of misallocation. Kellogg’s is the template: breakeven curve modeling showed that most of its coupon programs never covered the cost of the discount, which justified reallocating more than $75 million. The audit only matters if it ends in a reallocation decision. Returns also vary sharply by channel, with email marketing often cited for a 2000% ROI and even a basic abandoned cart email sometimes generating 30% of all revenue from automations.

What separates marketing strategy from campaign planning?

Campaign planning decides what to say and where to say it within a budget that already exists. Marketing strategy decides the budget itself: how much to spend, on which channels and capabilities, measured by which instruments, run by what kind of organization, including choices such as content marketing and email marketing as well as search engine optimization or social media, which is why strategy has to come before execution. Every case on this page changed at least one of those variables before any campaign was briefed.

How should B2B firms structure thought leadership?

Around the buyer’s business problems, not the firm’s technology portfolio. That is why content marketing works best when it creates valuable content for the audience rather than pushing product promotion. High-quality content builds authority and trust, and the formats can include blog posts, articles, and videos, while reflecting the latest trends and industry leaders only where they matter to the buyer’s agenda. Cognizant replaced generic technology narratives with six core narratives built from the specific pain points of its enterprise clients, and engagement improved because CXO readers found their own agenda in the content. Volume is not a strategy; relevance to a named decision-maker is.

Dove’s Campaign for Real Beauty featured women who differed from stereotypical models, and that differentiation helped define the brand for two decades. CeraVe used a humorous anti-advertising narrative, then confirmed the playful hoax in a Super Bowl commercial; the campaign generated over 32 billion earned impressions and the brand’s highest-ever week of moisturizer sales, while UNIQLO showed how standout execution can also drive measurable response with 1.3 million video views and 25,000 new newsletter subscribers.

The brands in this list did not spend their way to these results. They built the instruments that showed where every dollar worked, then moved the dollars. That is the discipline, and it compounds: better measurement funds better allocation, which funds the next round of growth. Your budget is already making these decisions. The only question is whether it is making them on evidence or on habit.