Add a new Klaviyo widget from your dashboard.
Select from either List size or Metrics from the list.
Click Connect via Klaviyo on the connection panel. You'll be asked to log into Klaviyo and give Geckoboard permission to access your account.
Once authorized, you'll either select the list you want to visualize data from or select and configure a metric.
After you return to the connection panel, click Create widget to start creating your Klaviyo widget. To learn more about creating dataset widgets, see our guide to creating visualizations from datasets.