“The problem is that although there is an enormous amount of
information in the log files, it’s not much good to the people that
pay your salary. They want to know how many people visited your
site, what they looked at, how long they stayed, and where they
found out about your site. All of that information is (or might be)
in your log files.”
“They also want to know the names, addresses, and shoe sizes of
those people, and, hopefully, their credit card numbers. That
information is not in there, and you need to know how to explain to
your employer that not only is it not in there, but the only way to
get this information is to explicitly ask your visitors for this
information, and be willing to be told “no.”