How does Scan and Go work at Walmart? Scan & Go is a technology that allows you to shop for yourself. This means you can simply select, scan, and pay for your purchases with your smartphone. This service is a great way to save time shopping.Further, you don’t need to pay when you’re done shopping without waiting in line at the register! See more: https://barcodelive.org/how-does-scan-and-go-work-at-walmart