Add To Notes
In order to PUBLISH workflows, you will need to establish a workflow trigger and a workflow action. Without both, you will only be able to save the workflow, not publish it.
This action adds a Note to the Contact Record.

Add Note
You can add a note to the contact record here. This can be used to help other assigned users get a grasp of any information about the contact you'll like to share.

Custom Values
You can also make use of the custom values when adding notes within the workflow. Learn more about Custom Values here

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