What is difference between html4 and html5?

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6. Why do we use html5?
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2. #using
3. #html4
4. #discuss
5. #popular
6. #major
7. #graphics
8. #difference
9. #introduced
10. #canvas
11. #javascript
12. #between
13. #container
14. #html5
15. #market
16. #choices