Things that can be learned from a web page request:

From Your IP Packets

address of your network host 38.107.191.108
port on your network host 59334

Using Internet Tools

name of your network host (by reverse DNS lookup of your address)

From Your User-Agent (A Web Browser, Most Likely)

user-agent identification CCBot/1.0
(
+http://www.commoncrawl.org/bot.html
)
documents your browser will accept text/xml,
application/xhtml+xml,
text/html;q=0.9,
text/plain;q=0.8,
image/png,
*/*;q=0.5
character sets your browser will accept ISO-8859-1,
utf-8;q=0.7,
*;q=0.7
your language preferences, in order en-us,
en;q=0.5
the web page that referred you here (There is no content in this item. Perhaps you typed the URL yourself or arrived here from a bookmark (shortcut) or newsgroup posting.)

From The User-Agent Identification

the complete string CCBot/1.0 (+http://www.commoncrawl.org/bot.html)
CCBot/1.0 (+http://www.commoncrawl.org/bot.html) robot