The easiest way to get an overview of your members is by going to Memberships > Overview.
Each membership type is listed here with its Active and Inactive Member numbers.
To view a list of Active Members for a single Membership Level, find that Membership Level in the Summary table and select the number shown under the Active column.
To view the list of Inactive Members do the same, except select the number under the Inactive column.
Active vs Inactive
An Active Member is a contact with an Active or Partial Membership.
An Inactive Member is a contact with an Expired or Cancelled Membership.