What triggers What's new notifications?

This article explains what triggeres the What's new notifications and emails.

What's new notifications are created from all actions related to the user, such as a reply to their comment, new comment to a chat they have participated in, or a new like to their comment.

New containers or widgets on a page however do not create What's new notifications. In such cases it is recommended the admin send an email notification inviting the user to participate to that particular part of the workspace.