The action "Change profile" changes the value of any field of a profile. This can be used, for example, to set interests or save the current date.
First select a "pool". (If your campaign is used for profiles from different pools, you must use a separate "Change Profile" node for each pool). Select the "Profile field" that you want to change. Finally, enter the "Value" you want to save in the field. Depending on the field type there are corresponding input fields available for this purpose. For the field type "Multiple selection" there is a button: "Merge values" available in addition to the option selection. If this check box is activated, selected options are added to the current options. If the switch is deactivated, all currently available options are removed before the selected options are saved.