The WordPress dashboard consists of the Home screen and Updates screen. It may also include Stats for certain plugins which you install to your blog later. The dashboard consists of eight panels which are referred to as modules or widgets and may increase in number after you install plugins.
Its here you are provided with an overview of some of your WordPress administration options.
The eight modules which are included in a new installation of WordPress located in your Home screen are:
Under the Updates screen you’ll find links to update your WordPress core installation, Plugins and Themes.
WordPress Core Updates
WordPress Updates for Plugins & Themes
Caution: Make sure you backup any custom changes you have made to your WordPress files and Templates before upgrading your WordPress core installation or you may loose them.