Back to school sales boost for Prince by Publicis & Unlimitail

Best practices

Best of Retail Media

Partner

Unlimitail

Categories

In-Store, Off-Site, On-Site

Objective Campaign

Prince wanted to turn into success one of the most competitive periods of the year : Back-to-School, thanks to Unlimitail and Carrefour data.

The Hypothetis

Prince enhanced its media mix with offsite Retail Media for the first time in Belgium, partnering with Unlimitail to bring precision targeting and measurable outcomes to the activation.

The challenges
  • Generate the biggest promo sales boost of the year
  • Reach a better qualified audience, by using retailer data
  • Recrute as many contest participants as possible

Media characteristics

Phase 1: Promo Push

Format: Display and Video FR + NL, with redirection to Carrefour.be
Placements: Meta Infeed & Stories
Targeting: Buyers of Prince biscuits and chocolates over the last 12 months

Phase 2: Engagement push through contest

Format: Display and Video FR + NL, with a redirection to the brand’s website to participate in a contest to win a Kapla toy
Placements: Meta Infeed & Stories
Targeting: Buyers of Prince biscuits and chocolates over the last 12 months

Reason Best Practise

The campaign demonstrated a smart, data-driven Retail Media approach driving awareness, conversion, and engagement through a full-funnel strategy.

Innovation
  • First-ever fully offsite Retail Media campaign in Belgium for Prince, activated during a key retail period
  • Use of transactional data to target shoppers online before store entry: a rare approach in FMCG
  • Two-phase structure combining conversion (promotion) and engagement (CRM contest)
Effectiveness
  • +63% impressions vs. target (2.7M total) and a CTR of 0.14%, exceeding benchmarks

  • High conversion rate: 12.9–14.6%, far above the 3.2% e-commerce average, with 30% new buyers

  • Increased engagement and sales, with buyers purchasing 2 products on average and baskets up +20% YoY

Audacity
  • Pioneering offsite Retail Media model, driven by retailer data for measurable in-store results

  • Integrated into a 360° media plan, positioning Retail Media as a performance engine

  • Bold first activation during a high- stakes period, with a data-led and performance-focused strategy

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