Whenever you create or modify anything in Kahootz you'll get a Notification section where you can choose to send a customised email to the workspace members. This means you can choose whether your new or changed content is worth telling the members about, and also tell them of any actions you want them to take. For example, reading the document, giving you feedback on it, responding to a questionnaire etc. This can really help to purpose your workspace.
If the item can only be seen by certain teams, then the notification will only go to the people in those teams, not all the members of the workspace - after all, there's no point in notifying people about the content they can't see!