Fav icon and robots.txt

Do I need these?

[spikedo55]

I was looking thru my error log file and found lots of messages referencing these two files? Do I really need these? If I do, where can I go to learn more about them? Thanks.

[bcolflesh]

favicon.com/

robotstxt.org/wc/robots.html

[jbinbpt]

Robots.txt for sure....

Favicon is optional but cool

[spikedo55]

Why do I need robots.txt? What does it do? Do you have a sample code of a typical file?

[jbinbpt]

Check this out also. All the info you need is here
from Search Engine World [searchengineworld.com]

[spikedo55]

Thanks. Has it hurt my site not having the robots file?

[jbinbpt]

Not a big problem, but good practice. Check out other threads on this board for robots to disallow. Lots of great stuff here.