Multiple email opening refers to the act of opening and viewing multiple emails at once, either in a separate window or within the same email client. This can be done for various reasons, such as quickly scanning through a large number of emails, organizing and prioritizing important messages, or responding to multiple emails simultaneously. It is a time-saving technique commonly used by busy professionals to efficiently manage their email correspondence. However, it is important to note that multiple email opening should be used with caution, as it can lead to overlooking important details or missing important messages.