Amazon has decided to phase out its checkout-less grocery stores that used 'Just Walk Out' technology. The company is now shifting towards newer solutions such as Dash Carts and self-checkout counters. 'Just Walk Out' technology, introduced in 2016, faced challenges including delays in receiving receipts and high operational costs. Amazon aims to improve its presence in the grocery market, competing with giants like Walmart and Costco. This move signifies the company's focus on expanding its supermarket presence.