What does the rel attribute do?

Related questions

1. What is a 301?
2. What is the difference between canonical form and standard form?
3. What does a canonical tag do?
4. What does Canonical mean in the Bible?
5. What is Hreflang in HTML?
6. What is meant by canonical representation?
7. How important is Hreflang?
8. What is link rel alternate?
9. How do I fix canonical problems?
10. What is SEO friendly URL?

Tags

1. #determine
2. #relationship
3. #document
4. #index
5. #element
6. #specifies
7. #engines
8. #between
9. #attribute
10. #information
11. #external
12. #search
13. #resource
14. #creates
15. #documents
16. #display