The 'Feedback' tool is used for creating and conducting surveys to collect information. This could be used for evaluation purposes or for informal student assessment.
Remember: The ability to set the forms as 'anonymous' also means that sensitive issues can be surveyed without students worrying who might see their responses.
Top tip: For some practical ideas for using the Feedback tool and other tools for feedback and formative assessment, visit the Teaching Toolshed pages.
For more information, see docs.moodle.org - Feedback.