Thanks to Shoppy's integration with Klaviyo, you will be able to use the audiences created by Klaviyo as targets for push notifications sent by Shoppy. To activate the integration with Klaviyo you will need an API Key. Go to the Klaviyo dashboard and click on your name (top right) and go to Account -> Settings -> API Keys. Create a new private key by clicking on the "Create private API Key" button and copy or write down the key you just created, which has the format pk_******. You are ready to activate Shoppy's integration with Klaviyo, go to the "Integrations" tab, activate Klaviyo and enter in the API Key that you just retrieved.