Prime Day Cross-Shopping Behavior: How Consumers Search, Which Retailers Win the Halo, and What Buyers Actually Do

When Consumers Start Searching for Prime Day Deals

The Prime Day shopping window opens weeks before the event, not on the day itself. Amazon search volume built steadily from late May 2024 but reached a clear peak the week of June 17 — three weeks before Prime Day on July 16–17 — running at index 113 vs the April baseline of 100. By Prime Day week, search had already retreated to index 104.

This pattern has a clear behavioral explanation: consumers use the pre-Prime Day window for research and shortlisting. By the time the event arrives, high-intent shoppers already know what they want. Prime Day itself is an execution moment, not a discovery moment — which has direct implications for both Amazon sellers and competing retailers trying to intercept the audience.

Which Product Categories Spike Most Before Prime Day

Electronics and streaming content dominate the pre-Prime Day search surge on Amazon. Electronics & Tech (Kindle, AirPods, iPad, MacBook, Ring doorbell) nearly doubled its April search share, while Streaming & Entertainment saw the steepest proportional lift — Prime Video titles like The Boys and House of the Dragon surged roughly 6× vs the April baseline. This reflects Amazon cross-selling its ecosystem: Prime Day is a Prime membership moment, and content searches travel alongside hardware deals.

Home, Kitchen & Appliances (#3) rode the Ninja Creami and air fryer wave. Toys & Games (#4, led by LEGO, Paw Patrol, Despicable Me) reflects parents front-running back-to-school and holiday gifting. Back-to-school supplies and luggage round out the top five, reinforcing that Prime Day functions as a late-summer shopping moment across demographics.

Which Competing Retailers Benefit Most from the Prime Day Halo Effect

Prime Day does not pull retail spend exclusively toward Amazon — it lifts the whole category. Walmart saw the sharpest spike by far, with average daily unique visitors jumping +249% versus the June–early July baseline. This isn't incidental: Walmart runs its own competing 'Deals for Days' sale in direct counter-programming to Prime Day, and the behavioral data shows it works.

Target roughly doubled its normal daily traffic (+110%), reflecting its own parallel promotional activity and its stronger base in apparel, home, and wellness. Best Buy's lift was more modest at +19%, consistent with its narrower electronics focus and smaller organic audience — though for a pure-play electronics retailer, any Prime Day lift on the categories it competes hardest in is meaningful.

Same-Day Cross-Shopping: Who Amazon Loses Attention To on Prime Day

About 1 in 10 Prime Day Amazon shoppers (9.8%, deduplicated) also visited at least one competing retailer on July 16–17. Walmart was the top destination at 5.4% of Prime Day shoppers — nearly 2.5× more than Target's 2.2%. eBay was a significant second at 3.4%, suggesting deal hunters use it for price comparison and refurbished alternatives on high-ticket electronics.

Best Buy (1.3%), Costco (0.5%), and Wayfair (0.4%) each drew smaller slices. The cross-shopping pattern confirms that the consumers most likely to leave Amazon on Prime Day are price-sensitive deal hunters, not the brand-loyal buyers executing on a shortlist they built three weeks earlier.

Deal-Driven vs Brand-Driven Buyers: What Purchase Patterns Reveal

The behavioral data draws a clear line between two Prime Day buyer archetypes. The search ramp-up and category data together reveal how differently they engage with the event.

Brand-driven buyers

These shoppers search by product name — Kindle, AirPods, iPad, MacBook, Ring doorbell — in the three weeks before Prime Day, building a shortlist with specific SKUs already in mind. The search peak at June 17 is driven heavily by this cohort. By Prime Day itself, they execute: visit a product page, check the discounted price against their mental anchor, and convert. They rarely visit competing retailers on the day because they've already decided on Amazon and on the brand. Their cross-shopping rate is substantially below the 9.8% average.

Deal-driven buyers

These shoppers search by intent — "best deals," "lightning deals," "% off" — and are substantially more likely to cross-shop. The 9.8% same-day cross-shopping rate is primarily composed of this cohort: Walmart's +249% halo and eBay's 3.4% reach among Prime Day shoppers are both deal-hunter signals. These buyers are price-elastic, respond to competing promotions (Walmart's Deals for Days, Target Circle Week), and defect if a better discount appears elsewhere. They also tend to buy across more categories — opportunistic rather than pre-planned.

For brands and retailers, the strategic split is stark: capturing brand-driven buyers requires being in the pre-event search window (June, not July). Capturing deal-driven buyers requires visible price promotion on the day — and on competing platforms simultaneously.

Frequently Asked Questions

When do consumers start searching for Prime Day deals?

Amazon search volume for Prime Day-adjacent queries peaks approximately 3 weeks before the event. In 2024, the peak was the week of June 17 (index 113 vs the April baseline of 100), with Prime Day week (July 16) registering slightly lower at index 104. Consumers research and shortlist in advance; Prime Day itself is an execution moment rather than a discovery moment.

Which retailers benefit most from the Prime Day halo effect?

Walmart benefits most, with a +249% spike in average daily unique visitors during Prime Day 2024 versus the June–July baseline — driven largely by its competing Deals for Days sale. Target follows with +110% lift. Best Buy sees more modest gains (+19%) given its narrower electronics focus. The halo effect is real: Prime Day puts consumers in deal-seeking mode and raises overall online retail traffic, not just Amazon's.

How many Prime Day shoppers visit a competing retailer on the same day?

9.8% of Prime Day Amazon shoppers (deduplicated) visited at least one competing retailer on July 16–17, 2024. Walmart was the top destination (5.4% of Prime Day shoppers), followed by eBay (3.4%), Target (2.2%), Best Buy (1.3%), Costco (0.5%), and Wayfair (0.4%). These figures are not mutually exclusive — some shoppers visited multiple competitors.

What product categories see the biggest search spikes before Prime Day?

In the two weeks before Prime Day 2024, the top Amazon search category spikes vs the April baseline were: Streaming & Entertainment (+0.15pp, driven by Prime Video titles), Electronics & Tech (+0.11pp, led by Kindle, AirPods, iPad), Home, Kitchen & Appliances (+0.07pp, Ninja Creami, air fryer), Toys & Games (+0.06pp, LEGO, Paw Patrol), and Back-to-School / Luggage (+0.03pp). Electronics is the clearest deal-driven category spike; streaming reflects Amazon's ecosystem cross-sell.

What is the difference between deal-driven and brand-driven Prime Day shoppers?

Brand-driven buyers search by product name (Kindle, AirPods, iPad) weeks before Prime Day, arrive with a shortlist, and execute on the day with low cross-shopping. Deal-driven buyers search by intent ("best deals," "lightning deals") and are far more likely to visit competing retailers the same day — they account for the majority of the 9.8% cross-shopping rate. Walmart's +249% halo and eBay's 3.4% reach among Prime Day shoppers are both deal-hunter signals.

Does Amazon Prime Day increase traffic to Walmart and Target?

Yes. Behavioral panel data shows Walmart's daily unique visitor count spiked +249% on Prime Day 2024 vs the pre-event baseline, and Target saw +110% lift. Both retailers run parallel deal events (Walmart's Deals for Days, Target Circle Week) timed to intercept Prime Day demand. The data confirms these counter-programming strategies work: consumers put into deal-seeking mode by Prime Day awareness spread their browsing across multiple retail destinations.

When is the best time to target consumers for Prime Day?

For brand-driven product categories (Electronics, Home, Toys), the highest-intent window is 2–4 weeks before Prime Day — the period when consumers actively research and shortlist. Amazon search peaks at week 3. On the event day itself, price and promotion visibility dominate for deal-sensitive shoppers. Brands that invest only in Prime Day-day advertising are missing the decision window that matters most for considered purchases.

Methodology

Data source: Measure's permissioned behavioral panel. Analysis covers US panel, April–July 2024, encompassing Amazon search events, Chrome/Safari browse events on retailer domains, and Amazon purchase events. Prime Day window: July 16–17, 2024. Baseline: June 1–July 7 + July 10–14 (42 days) for site-visit lift calculations; April 2024 monthly average for search index. Category search share lift is expressed in percentage points (pp). Cross-shopping figures use deduplicated unique users. All figures are directional signals from a behavioral panel and should not be taken as absolute market volumes.