If you login to your wordpress admin area ,you will see some useful (or maybe useless) dashboard widgets. It is a useful feature in single author blogs. By default,you can turn off any dashboard widget using the “Screen Options” tab at the right top of the admin area. In multi-author blogs it leak some important details to other users. Example:incoming links,recent coments, right now, recent drafts etc.
To completely remove wordpress dashboard widgets (Dashboard quickpress widget,incoming links widget,Recent comments widget,Right Now widget,Dashboard Plugins widget,Dashboard Recent Drafts widget,Dashboard primary widget,Dashboard secoundary widget)