Currently available in six markets, the Bentonville, Ark.-based mega-retailer’s Online Grocery Delivery service will grow to serve 100-plus metropolitan areas nationwide by the end of 2018. Households will be able to purchase fresh produce, meat, seafood and bakery items, as well as pantry staples and general merchandise online at everyday low prices through or the company’s mobile app.

Orders will be fulfilled through Walmart’s personal shoppers and crowd-sourced delivery services. Currently, the retailer employs more than 18,000 personal shoppers to power the program, with plans to add thousands more this year.