Analytics custom statistics
The Analytics custom statistics web part logs a hit for a custom web analytics statistic when visitors access the page where the web part is placed.
Please note that the 'Web service URL' property of the web part contains a sample URL by default. For the web part to display some data, you need to specify a URL of an existing service/server in the property and set 'Visible' property to TRUE.
The web part belongs to the Web analytics module. Full documentation of the module can be found in Kentico CMS Developer's Guide -> Modules -> Web analytics.