Answer:
They're important because they can affect how you're perceived.
Explanation:
If you're emailing your boss, you don't want to use a rude tone. If you're emailing them to say you want a vacation, you're most likely not going to say, "Hey, dude. Give me a day off thanks lol." because they could perceive you as lazy or disrespectful since you only know each other from work. However, if you're emailing a close friend, you could talk to them casually since you're close. Hope this helps!
