Different ISPs have different ways of granting access to the logfiles. Although there's no standard, the most common is FTP using the same server name/login/password that are used for uploading web pages. Ask your ISP 'How do I get access to my raw logfiles'
Server refers to the domain name of the server containing logfiles. This is often the same as the domain name for your web server eg www.mydomain.com but it's sometimes a generic name such as ftp.hostingcompany.net
The username and password are usually the same for administering the site or uploading pages. Your ISP should have given you this administrative account when you signed up.
