Today Google announced its same-day delivery service is now available in states across the midwestern U.S., including Illinois, Iowa, Wisconsin, Michigan, Ohio, and Indiana.

The service, called Google Express, first launched two years ago and offers consumers the opportunity to have purchases made with select retailers delivered to their door. The service hinges on Google’s partnership with major retailers, including Ace Hardware, Barnes & Noble, Costco, Kohl’s, L’Occitane en Provence, Fry’s Electronics, Moosejaw, PetSmart, Road Runner Sports, Staples, Toys “R” Us, Babies “R” Us, Treasure Island Foods, Ulta Beauty, The Vitamin Shoppe, and Walgreens. In the Midwest, Google Express will also deliver from local retailers like Wrigleyville Sports.

Google is aggressively rolling out its day-of delivery service, which is already available in New York, Los Angeles, and San Francisco, to compete with Amazon’s Prime service. Amazon boasts 1 to 2-hour delivery of everything from food to dry goods in Atlanta, Los Angeles, Seattle, San Francisco, Baltimore, Dallas, Indianapolis, Manhattan, Miami, Washington, D.C., and New York.

Amazon may have an advantage against Google. The company already has a well-established network of distribution centers, allowing goods to be pulled from a single location and delivered quickly. Google, on the other hand, does not. Its service picks up goods from individual stores and then delivers them to consumers, which means deliveries from Google may take more time. It may also be hard for Google to replicate Amazon’s model.

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Earlier this year Google reportedly shuttered two distribution centers it was testing in Mountain View and San Francisco. It’s not clear why Google eschewed the idea of distribution centers or how it plans to compete with the scale of Amazon’s business. But it is certain that Google is very serious about fleshing out its commerce business.

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