What is Hreflang in HTML?

Related questions

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4. How important is Hreflang?
5. What is link rel alternate?
6. What is self referencing Hreflang?
7. What is meant by canonical representation in logic design?
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Tags

1. #website
2. #optional
3. #attribute
4. #document
5. #restrictions
6. #clarify
7. #search
8. #targeting
9. #language
10. #webmasters
11. #geographic
12. #hreflang
13. #engines
14. #described
15. #specifies
16. #element
17. #geographical
18. #interpreted
19. #lingual
20. #alternate