Bidetlity review for Klaviyo: Email Marketing & SMS

Unfortunately, not a good introduction on Klaviyo's part and support is slow to respond, if at all. Too bad! The Shopify integration does not work either. Support says everything is set up correctly but when I want to create a campaign, I have to manually export the contacts from Shopify and import them into Klaviyo. So what is the point of installing a Klaviyo app?