MeowMail is an integrated email marketing application within the Shopify backend that utilizes AI technology to automatically select the optimal sending times, achieving over 98% email deliverability. It supports drag-and-drop editing, imports email lists from Klaviyo, creates new emails using the Beefree editor, and manages marketing campaigns with budget limits. MeowMail also offers enterprise-level support and automatic text translation, helping businesses achieve efficient email marketing at a low cost.