After selecting merchandise the customer proceeds to a counter or terminal to pay and complete the purchase. That final stage is checkout. It is the moment when browsing turns into a recorded sale.

Checkout can occur at staffed lanes, self-service kiosks, or mobile devices carried by associates. Speed and accuracy matter; long waits rank among the top frustrations in retail. Retailers experiment with express lanes, self-checkout, and scan-and-go technology to reduce friction. The physical layout of the checkout area also influences impulse purchases of small items placed nearby.

Online, checkout is the sequence of pages where the shopper confirms the order, enters payment, and chooses delivery options. Cart abandonment often peaks at this stage. Whether physical or digital, a smooth checkout leaves the customer ready to return; a clumsy one can erase the goodwill built during the rest of the visit.

Everything in the store leads to this transaction point.