It is important to prepare for your seminars so that you are able to participate fully, feel confident, and get the most out of them.
Often tutors will set some reading or a task to do in advance. Different tutors might communicate this in different ways. For example, the required activities or reading may be posted on your module Canvas course, noted on your resource list, or even emailed out to you. So always be pro-active and check what you need to do in advance of each seminar.