An inherited member of a playlist is someone who has access to that playlist because they were given access to a higher-level folder or catalog that contains it.
To view and learn more about the inherited members of a playlist:
1) Click the More / 3 dots button that is located above your playlist and select Member Settings.
2) You can manage your inherited members by clicking on them. This will take you to the point of the share where you can update the user's permissions.
For more information on folder permissions, click here.