Why does WhatsApp Web need phone?

Related questions

1. Can WhatsApp be used offline?
2. Can I use WhatsApp Web without my phone?
3. Can I open WhatsApp without phone number?
4. Does WhatsApp on Mac work without phone?
5. Why WhatsApp Web is not working?
6. Can I still use WhatsApp without SIM card?
7. How do I get the 6 digit code for WhatsApp?
8. Can I open same WhatsApp account on two devices?
9. Can WhatsApp be used without SIM card?
10. Does WhatsApp send verification code?

Tags

1. #battery
2. #condition
3. #whatsapp
4. #phone
5. #computer
6. #connected
7. #needed
8. #constantly
9. #given
10. #mobile
11. #running
12. #receive
13. #internet
14. #synced
15. #should
16. #messages
17. #because
18. #account
19. #extension