Delivery speed directly affects marketplace performance. Amazon's algorithm favors listings that offer fast, reliable shipping, and Walmart's WFS badge is tied to similar expectations. Slow fulfillment doesn't just frustrate individual customers — it suppresses visibility across your entire catalog.
Customer expectations have shifted permanently. Same-day and next-day shipping windows, once reserved for a handful of categories, are now a baseline expectation across most of ecommerce — and brands that can't meet that bar lose orders to competitors who can.
Day-of-order fulfillment is also an operational discipline, not just a shipping promise. It requires inventory accuracy, efficient warehouse layout, and staffing structured around order cutoff times — all working together consistently, every day.