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You can add the widget only for a specific page. If you know that users might have questions when they go to a particular page, you can provide them with the opportunity to solve possible issues with the help of the Konverso Kbot for Snow virtual agent.
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Using custom buttons
When adding a widget to a portal page, you can use a Kbot floating button, or create a custom one. The latter allows you to fine-tune its position on the page and set the way it looks.