Components and groups can be thought of as containers that hold stuff. Typically raw geometry. Tags are given to or put on components and groups and are primarily used to control visibility of those objects. Tags provide no separation between entities. You can make either a component or group of the geometry to create an object. That can then be copied as many times as needed. If you want to make each object different, you can either first make the components unique and then edit them. If you create a group of the first one and then copy it, there’s no need to use Make Unique to make the copies different from the others. Simply open them for editing and make the changes.