Supervision is a process that involves a manager meeting regularly and interacting with worker(s) to review their work. The purpose is to monitor tasks and workload, solve problems, support workers in dealing with complex situations and to promote staff development. Supervision aims to provide accountability for both the supervisor and supervisee exploring practice and performance. It also enhances and provides additional evidence for annual performance management and review.
Supervision is more prominent in fields where employees have lots of responsibility, like social care. Supervision is not something to be worried about, but is an opportunity for you to demonstrate areas where you are working well in, or to ask for more support to better do your job.
Ask your employer if they have a supervision policy and what that entails for information specific to you.