something electronic, such as sending an email, using a credit card, etc., that shows where you have

中文解释

电子痕迹（指发送电子邮件、使用信用卡等留下的记录） Every website you visit leaves an electronic footprint of your surfing habits. 你所访问的每个网站都会留下你浏览习惯的电子痕迹。