Student Academic Reps are the voice on your course.  They provide feedback on positive or negative issues you may have about your academic experience to a range of different meetings.  They are also a fountain of knowledge when it comes to other issues you may be facing at University and should be able to signpost you to the range of support services available to you.  You can find out who your Student Academic Reps are here:

http://www.cardiffstudents.com/your-voice/academic-reps/

You can also put yourself forward to become a Student Academic Rep each October, and will receive training and support to ensure you can be effective in this role.