A company or organization will embed a tracker in emails sent to you, usually hidden within an image or a link. When the email is opened, code within the tracker sends data back to the company.
一些公司或组织会在发送给您的电子邮件中嵌入跟踪器（通常隐藏在图像或链接中）。打开电子邮件后，跟踪器中的代码就会执行，并回传数据。