Klaviyo is an email marketing platform designed for e-commerce businesses. It uses data from an e-commerce store and other customer data to create targeted email campaigns for specific customer segments. It uses sophisticated segmentation and automation tools to help businesses increase revenue by targeting the right people with the right message at the right time. Klaviyo also provides analytics and reporting tools to track the performance of email campaigns, and includes integrations with various e-commerce platforms, such as Shopify and BigCommerce, to make it easy to import data and set up campaigns. Some of the benefits of using Klaviyo includes ability to personalize marketing campaigns, increase in revenue by using automation, and real-time tracking of campaigns performance.