Constant Contact is an online marketing platform designed to help businesses build and maintain customer relationships through email marketing and other digital marketing tools. It enables users to create professional, mobile-responsive email campaigns with ease, using customizable templates and a drag-and-drop editor. Constant Contact also offers features like contact list management, A/B testing, marketing automation, and real-time analytics, helping marketers optimize their email strategies for maximum engagement. Additionally, the platform provides tools for social media marketing, event management, and online surveys, making it a versatile solution for businesses aiming to increase their digital presence.