This module gives some information about the visitors of your website (how many, where do they come from, which language do they use, which pages have been visited most). It's not as detailled as stand-alone tracking tools, but fits to most needs.
Visitor Statistics is installed by default in WBCE CMS.
Version 0.1.11 solves an issue with storing a little bit too much information in the database. It is strongly recommended to update the module as soon as possible. (It's not a security issue).
Since WBCE CMS 1.3 the line $referer = $_SERVER['HTTP_REFERER']; in the config.php is no longer needed.