网站的站点日志有什么用？
下面是一段站点日志的内容，请问是什么意思？
#Software: Microsoft Internet Information Services 6.0
#Version: 1.0
#Date: 2007-06-08 02:00:14
#Fields: date time s-sitename s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status
2007-06-08 02:00:13 W3SVC218 61.141.5.28 GET /Index.asp - 80 - 202.103.38.23 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1) 200 0 0
2007-06-08 02:00:13 W3SVC218 61.141.5.28 GET /news.css - 80 - 202.103.38.23 Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1) 200 0 0