Hence is a cool word because it makes you sound smart and authoritative. For example: Brushing and flossing daily will lead to good oral health hence no traumatic dental visits. (FYI― In my other life, I work for a dentist . . . just a little public service plug.)
The archaic meaning of hence is depart! go away! ―the exclamation points are the dictionary’s, not mine― as in: After a long, hard life they were taken hence. I found this creepy example on the internet . . . Pretty sure I don’t want to know where hence is . . .