The retail industry is undergoing a massive transformation driven by consumers' adoption of new digital technologies. By 2020, brick-and-mortar retailers will need to fundamentally change how they do business to survive. Seven key trends will impact brick-and-mortar stores: leveraging social media data; embracing "showrooming"; tailoring store inventories; rationalizing store sizes; using mobile technologies; fulfilling online orders from stores; and developing "dark stores" for online order fulfillment. To adapt, retailers must implement an integrated online and in-store shopping experience, understand demand across all channels, customize product assortments for each customer, and enable flexible, real-time supply chains.