The term "return rate" refers to the percentage or proportion of items that are returned after being sold, purchased or ordered. It is a measure used by businesses to evaluate their performance in terms of customer satisfaction and sales effectiveness. A high return rate may indicate issues with the product itself such as defects, poor quality or incorrect sizing; it could also suggest problems with the marketing, advertising or sales process that led customers to make an uninformed purchase decision. On the other hand, a low return rate can be seen as an indicator of successful customer satisfaction and effective sales strategies. Overall, the "return rate" is an important metric for businesses to monitor in order to improve their products, services and overall customer experience.