In the context of electronic mail, a marker is a feature used to highlight a message for subsequent attention. Employed within email clients and webmail interfaces, this function allows users to categorize and prioritize correspondence. For example, a user might apply this marker to a message requiring a follow-up action, thereby ensuring it remains visible until the task is completed.
The use of this feature enhances email management and boosts productivity. By visually distinguishing certain messages, individuals can efficiently address important communications amidst a high volume of daily mail. Historically, this practice evolved from physical paper systems where memos were marked for specific actions or filing purposes, translated into the digital realm to maintain organizational efficacy.