Email etiquette refers to the set of guidelines that help individuals communicate effectively and professionally through email. Key practices include using a clear subject line, addressing the recipient appropriately, and maintaining a polite tone. It's important to proofread your message for spelling and grammar errors before sending it, as this reflects your attention to detail. Additionally, being concise and to the point is crucial, as long emails can overwhelm the reader. Always include a proper closing and your contact information. Respecting the recipient's time by avoiding unnecessary follow-ups and responding promptly also enhances communication quality in the digital space.