For brands selling on Amazon, Prime Day has long been the marquee sales event of the year. But with Amazon’s newer Big Deal Days—typically hosted in Q4—the retail calendar has become more dynamic and demanding. The good news? These seasonal peaks create multiple revenue opportunities. The challenge is knowing how to plan, promote, and pivot to make the most of each one.
Leading agencies like Cart.com are helping brands build year-round marketplace strategies that flex for both Prime Day and Big Deal Days, maximizing performance during both summer and holiday shopping seasons.
Prime Day vs Big Deal Days: What’s the difference?
While both events are designed to spike traffic and sales, they serve different strategic roles for sellers:
Prime Day
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Typically held in July
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Focused on summer promotions, new launches, and category-specific deals
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Leverages fresh inventory and seasonal interest
Big Deal Days
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Usually hosted in October as a pre-holiday sale
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Warms up audiences for Black Friday/Cyber Monday
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Key to moving aged inventory or testing holiday bundles
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Requires alignment with longer-term Q4 strategy
Understanding these differences helps brands time promotions, inventory, and advertising investment more effectively across the second half of the year.
How agencies adapt strategies for Q4 success
Working with an experienced ecommerce agency ensures your brand isn’t just reacting to the retail calendar—but proactively capitalizing on it. Here’s how Cart.com adjusts marketplace strategy for Big Deal Days vs Prime Day:
Audience segmentation and ad retargeting
Prime Day builds your funnel. Big Deal Days work that funnel. We identify audiences who engaged during Prime Day and re-target them with tailored promotions in Q4—driving higher conversion at lower acquisition costs.
Ad creative and copy testing
We test creative and messaging during Prime Day, then double down on proven winners in Q4. For Big Deal Days, we adjust visuals and copy for urgency, gifting, and holiday themes.
Inventory and fulfillment coordination
Using our software and fulfillment integrations, we help brands ensure top SKUs are in stock at the right FCs, whether you're using FBA, FBM, or a hybrid model. This prevents stockouts and protects Buy Box share during peak traffic.
Promotions and pricing alignment
Prime Day often features steeper discounts to generate excitement. Big Deal Days may benefit from bundling, BOGO, or holiday-themed offers. We tailor strategies to drive both margin and volume.
Post-sale retention funnels
Cart.com agencies support full-funnel growth. After each event, we help you capture and nurture new customers through remarketing, email flows, and cross-channel campaigns—turning event buyers into long-term loyalists.
Don’t just sell—scale
The most successful brands treat Prime Day and Big Deal Days as two acts in a single performance. With the right partner, you can optimize each for its strengths while aligning both to a unified Q4 strategy that drives measurable growth.
Cart.com’s marketplace experts specialize in building adaptive, data-driven campaigns that span the full sales cycle—from pre-event planning to post-event analysis and retention.
Ready to win this Q4? Contact us to see how Cart.com can help you optimize for Amazon Big Deal Days, Prime Day, and beyond.
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