Ability to filter for contacts that are not yet tagged
We have noticed that if you have tagged contacts and non-tagged contacts in a database (especially when you have a lot of contacts), it can be very hard to find the contacts that are not tagged. There is no way to identify them so that you can segment those contacts later down the road. It would be ideal to be able to identify any contacts that are not tagged.
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You can use the "Is Empty" string in Advanced filters to find Contacts that do not have any tags applied:
https://answers.kw.com/hc/en-us/articles/15099687485715-Contacts-Filters-List-and-Advanced-Filter-Options