Go to WiserNotify dashboard
Create any notifications and if you've already created the notification click on edit
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Now, navigate to display section
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Here, under segmentation, you'll see an option for country based targeting
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Turn it ON and you'll see two option Display/Hide
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Now, lets say you want to display notification in USA, and hide it in Canada. Add these details in the given section
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That's it. Now save it.
Your notification will only be displayed in USA and will be hidden in Canada