Content rating (Drop down list)
The Content rating web part enables website visitors to rate content of the page where the web part is placed. The web part has three appearance modes that can be switched in its properties, while the Drop-down list mode is used on this page. In this mode, rating is performed by selecting a value from the drop-down list and clicking OK.
The web part belongs to the Content rating module. The module's full documentation can be found in Kentico CMS Developer's Guide -> Modules -> Content rating.