Every qualified counsellor who is in practice will have (to have) supervision, usually at least an hour and a half month – it is a working lifetime commitment, so it is important that you find the right supervisor for you (if you have a choice).
What actually is counselling supervision? It is pretty hard to explain, as we discuss and review each other’s work without there being managerial oversight. In counselling, your supervisor is not your manager and vice versa. It is easier to explain what it is not… It is not therapy, it is not line-management, it is not employer – employee relations.
The same as for therapy, there are a whole myriad of supervision frameworks out there. Back in the day of Freud (yes, he has something to answer for), they met in small informal groups to analyse their work and each other. Some decided that the analysing of the work had to be done in supervision and any personal issues arising from the work should be brought to personal therapy.