Description: Efficiency metrics in e-commerce are measurements that evaluate how effectively available resources are used to achieve business objectives. These metrics are fundamental to understanding the performance of an online store, as they allow owners and managers to identify areas for improvement and optimize processes. Efficiency metrics can include indicators such as the conversion rate, which measures the percentage of visitors who make a purchase, and customer acquisition cost (CAC), which assesses how much is spent on marketing and advertising to attract a new customer. Additionally, logistics-related metrics, such as delivery time and return rate, can be considered, as they directly impact customer satisfaction. In a competitive environment like e-commerce, where user experience is crucial, these metrics help companies maximize profitability and provide quality service. Collecting and analyzing these metrics enables businesses to make informed and strategic decisions, ensuring that resources are utilized optimally to achieve commercial objectives.