Changes made in Cyberday are well logged. You can view event logs at different levels - as an admin from the "All events" page or from an individual item (e.g. task card or documentation card).
This view lists all changes in your account. You can search for events based on, for example, type, user or desired time period.
Task, guideline and documentation item are most important content items in Cyberday. You cannot make changes to these without leaving a trace of the change.
Under these items, you will find their own "Log and comments" tab, where you see the list of events.
With this view, you can also create your own log entries, for example about improvements made to the item or related incidents. You can also mention the desired user in your own comment, if you want them to receive a notification about your comment.