Core Insights - Amazon plans to expand its same-day grocery delivery service to 2,300 cities by the end of this year, more than doubling its current reach [1] - The grocery industry, valued at $1 trillion, sees Walmart as its leading retail competitor [1] - Customers can order fresh produce, dairy, meat, seafood, baked goods, frozen foods, and household items [1] - Prime members can enjoy free same-day delivery on orders over $25, while non-members will incur a $12.99 service fee regardless of order size [1]