As the world continues to move online, how we shop for our groceries also is changing.

Already two years ago, online grocery shopping studies found that one-third of primary grocery shoppers had bought groceries online within the past year, and that this trend was extending across all age groups. Brick Meets Click, a retail consultancy, surveyed U.S. consumers and reported that 1 in 5 of these shoppers was now an active user of online grocery services, and that these shoppers spend an average of 16 percent of their weekly grocery dollars online.

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