What is favicon used for?

Related questions

1. How do I increase favicon size?
2. Do I need a favicon?
3. How do I download an icon from a website?
4. What is favicon cache?
5. How do I remove an icon from my Blogger address bar?
6. Does favicon have to be in root?
7. What is favicon in Blogger?
8. Does favicon have to be 16x16?
9. How do I add a favicon to Blogger?
10. Does a favicon have to be square?

Tags

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