On-line form
The On-line form web part allows live site users to fill in and submit a pre-defined on-line form. This is typically useful in cases when you need your website users to provide you with structured information like orders, questionaires, satisfaction surveys, etc. Forms can be defined in CMS Desk -> Tools -> Forms. The same administration interface can be used view and manage submitted form records.
The web part belongs to the Forms module. The module's full documentation can be found in Kentico CMS Developer's Guide -> Modules -> Forms.