Users with permission to modify the content of a can change text, graphics, links, structure, and so on. To keep track of who made changes to a web and which files were changed, you can log authoring actions in a and all its . Then the system records the time an author's action was performed, the author's user name, the web name, the remote host, and per-operation data, and stores this information in a log file named _vti_log/Author.log, in the root web. If there were a security breach, you could analyze this log file to determine what authoring activity occurred on the web.
To log authoring actions