Why is CMS headless?

Related questions

1. What is a CMS server?
2. What is the purpose of using CMS?
3. How many types of CMS are there?
4. Is Google sites completely free?
5. Is Facebook a CMS?
6. What are CMS platforms?
7. Is Google sites good for small business?
8. Does Facebook use a CMS?
9. What is a Content Management System explain important features of Joomla?
10. Is Google Sites a CMS?

Tags

1. #headless
2. #deliver
3. #device
4. #interface
5. #remains
6. #management
7. #content
8. #repository
9. #built
10. #accessible
11. #makes
12. #display
13. #restful
14. #wherever
15. #ground
16. #system