Use the 
To use tagging, you must license Guide with Offers.
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                                                                Click New Rule or click on an existing rule to edit it. 
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                                                                Click Action to display a list of actions. 
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                                                                Select the Remove Tag from Visitor action. 
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                                                                On the right side of the page, start typing the name of the tag to remove from a visitor. Select one or more tags to remove from the visitor. 
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                                                                Click Save Rule.