1) Verizon — A.I. assistant turns service reps into sellers

• Company: Verizon
  
  
• A.I. use: On-screen A.I. assistant that helps customer service reps answer faster and pivot into offers/upsells.
  
  
• ROI impact: Sales through its 28,000-person service team up nearly 40%. 
  
  
• Time to results: Began deploying July 2024, scaled January 2025, results reported April 2025. 

2) Zalando — GenAI creative production: 6–8 weeks → 3–4 days

• Company: Zalando (EU fashion retailer)
  
  
• A.I. use: Generative A.I. to produce marketing imagery
  
  
• ROI impact: Costs down 90% for imagery production; faster trend response driving engagement. 
  
  
• Time to results: Production time cut from 6–8 weeks to 3–4 days. 

3) Klarna — Weekly campaign refreshes, $10M/yr savings

• Company: Klarna
  
  
• A.I. use: GenAI for campaign imagery + supplier reductions (translation/production/social).
  
  
• ROI impact: ~$10M annual marketing cost savings; $6M of that from image production; $4M from external supplier cuts; also reduced S&M budget 11% (with 37% of savings attributed to A.I.) while increasing campaigns. 
  
  
• Time to results: Generated 1,000+ images in the first 3 months of 2024; image cycle reduced 6 weeks → 7 days. 

4) Chime — Campaign launch time: 10 weeks → 4 weeks (and content ROI)

• Company: Chime (fintech)
  
  
• A.I. use (marketing): AI-assisted creative production to bring creative in-house and reduce agency reliance; custom “Chime GPT” trained on top-performing blogs to scale content output.
  
  
• ROI impact: Creative production time down 60%; campaign turnaround cut by 6 weeks (10 → 4 weeks); content production costs down 30% and ~5% lift in organic visibility across SEO + “answer engines.” 
  
  
• Time to results: Turnaround improvement stated as operational reality of current workflow; campaign cycle reduction quantified 10 → 4 weeks. 

5) Mondelez — 30–50% lower marketing content production costs

• Company: Mondelez (Oreo, etc.)
  
  
• A.I. use: GenAI tool developed to produce marketing content
  
  
• ROI impact: 30%–50% cost reduction in marketing content production (exec-reported). 
  
  
• Time to results: Tool development began “last year” (relative to Oct 2025) and expected to produce air-ready short TV ads as soon as the 2026 holiday season. 

6) Room & Board — Predictive personalization in email boosts conversion

• Company: Room & Board (furniture)
  
  
• A.I. use: Marketing Cloud Einstein predictive content/product recommendations in email personalization.
  
  
• ROI impact: 150% higher conversion rate for customers engaging with predictive content and clicking to buy. 
  
  
• Time to results: Not specified in the public write-up (impact is quantified; timeline not disclosed). 

7) Nielsen MMM study of Google A.I. ads — consistent ROAS & sales-effectiveness uplift

• Company / Study: Nielsen Marketing Mix Modeling study on Google A.I.-powered ad solutions (multi-brand study)
  
  
• A.I. use: AI-powered YouTube video campaigns, Demand Gen, Performance Max, Broad Match (and combinations).
  
  
• ROI impact (key findings):
  
  • +17% ROAS vs manual for AI-powered YouTube video campaigns
  • +23% sales effectiveness for combined AI video approaches
  • +10% ROAS / +12% sales effectiveness when adding Demand Gen to Search + Performance Max
  • +8% ROAS (PMax vs Search-only) and +15% ROAS (Broad Match vs other match types)
    
    
• Time to results: MMM is based on historical performance; the study doesn’t present “weeks-to-results” in the excerpted findings.