What is the purpose of favicon?

Related questions

1. Why I tag is used in HTML?
2. What favicon sizes do I need?
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5. What are the different tags used in HTML?
6. What is a site icon WordPress?

Tags

1. #favicons
2. #found
3. #small
4. #browsers
5. #address
6. #website
7. #browser
8. #iconic
9. #represents
10. #often
11. #image
12. #lists
13. #favicon
14. #aggregators
15. #bookmarks
16. #pronounced