Kroger is implementing a $9 billion initiative called Restock Kroger to enhance its e-commerce and omnichannel capabilities in response to the growing online grocery market. The company is investing in artificial intelligence, autonomous delivery, and automated warehouses in partnership with firms like Nuro and Ocado to improve customer experience and operational efficiency. By leveraging advanced technologies, Kroger aims to remain competitive in the evolving retail landscape of the 4th industrial revolution.