Comments are a useful way to communicate with other team members, document change requests from Client discussions or changes in strategy or direction. You can add a comment to any KPI, Budget or Insight from within the App or from a Slack notification.
To give you complete flexibility, there is also an option to save a comment as Note. This can then be utilised for creating business logic such as pulling in only Notes to your Data Studio reports.
By saving Comments and Notes as you receive notifications you will be able to speed up the reporting process and have better team collaboration. Check out the documentation for more examples on how Comments and Notes can be used.