Prime Day 2026: Advertisers Shift to Strategic Media Planning as Offsite Commerce Media Matures
Event summary
- TripleLift reported a 45.2% year-on-year growth in global advertiser spend during Prime Day 2026, with 61% of spend coming from non-shopping categories.
- Advertisers began campaigns two weeks early, with spend peaking at +79.9% on Day 1 and maintaining structured momentum throughout the event.
- Private marketplace deals intensified as Prime Day progressed, particularly in verticals like travel (63.4%), computing (57.4%), and CPG (46.1%).
- Online video buyers allocated 39.4% of Prime Day spend, showing a preference for curated inventory with higher deal share of voice.
The big picture
Prime Day 2026 marked a significant shift in advertiser behavior, treating the event as a planned media moment rather than a retail flash sale. This maturation of offsite commerce media reflects broader industry trends where brands are increasingly leveraging high-attention consumer moments for strategic advertising campaigns. The structured spending patterns and preference for curated inventory signal a new era of media planning that prioritizes quality and control over opportunistic spending.
What we're watching
- Strategic Planning
- How advertisers' shift from reactive to structured media planning for Prime Day will influence Q3 and Q4 campaign strategies.
- Inventory Quality
- Whether the preference for curated inventory over open auctions will become a permanent trend in high-stakes advertising moments.
- Vertical Specialization
- The pace at which non-retail verticals like travel, computing, and CPG will continue to dominate private marketplace deals during major events.
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