In the context of sales, marketing, and e-commerce analytics, ATC stands for "Add to Cart," representing a critical consumer behavior metric and key performance indicator. The Add to Cart rate measures the percentage of online store visitors who select a product and place it into their digital shopping cart, signaling strong initial purchase intent and consumer interest. Sales and digital marketing teams track this metric closely alongside conversion rates and cart abandonment figures to evaluate the effectiveness of product page layouts, pricing strategies, and user experience design. Optimizing the steps leading to an Add to Cart action helps online merchants reduce friction and ultimately drive higher completed checkout volumes and revenue generation.