How to set up the Klaviyo integration
First, navigate to the campaign where you'd like to connect the Klaviyo integration, then click "Integrations" from the menu on the left side of the screen.
Next, either search Klaviyo in the upper right search box, or click the Email category, then click Klaviyo.
Then click "Connect New Account".
If your desired Klaviyo account is not currently connected, click the "Connect New Account" button at the bottom of the screen.
You'll be prompted to enter your Klaviyo API key, which can be found in the Account Settings area of Klaviyo.
Next, choose your Klaviyo account from the list.
The integration will then be complete, and your client's Klaviyo metrics will be imported and displayed within the dashboard.