5.1.7 Email etiquette

Email etiquette helps to:

• communicate better 
• create a better relationship with the recipient

=> Speaking in person versus communicating over email is entirely different.
One phrase in the wrong context could hurt your communications or brand.

That's why following proper etiquette while writing emails is so important because it helps you convey your message clearly:

Source: https://www.mailmodo.com/guides/email-etiquette/#what-is-email-etiquette