There has never been a higher level of interest in online grocery shopping, as consumers increasingly prefer a safer and more convenient shopping experience. The question for retailers who have been used to seeing only a small fraction of their sales transact online is whether they can keep up with the trend. They need to make the shift to much, if not most of their sales occurring via eCommerce. Their success will depend heavily on their ability to actually deliver the items displayed online. Stockouts mean online shoppers go elsewhere to find what they need.