The conversion rate is a key metric in marketing and e-commerce that measures the percentage of visitors or users who take a desired action, such as making a purchase, signing up for a newsletter, or filling out a form. It is calculated by dividing the number of conversions (desired actions) by the total number of visitors or interactions and multiplying by 100 to express it as a percentage. A high conversion rate indicates that a significant portion of your audience is taking the intended action, while a low conversion rate may signal the need for optimization in the marketing or user experience strategy. The conversion rate is a critical measure for evaluating the effectiveness of campaigns and website performance in achieving specific goals.