"Marketing automation refers to software platforms and technologies designed for marketing departments and organizations to more effectively market on multiple channels online (such as email, social media, websites, etc.) and automate repetitive tasks. Marketing departments, consultants and part-time marketing employees benefit by specifying criteria and outcomes for tasks and processes which are then interpreted, stored and executed by software." wikipedia.org

"Marketo is a Marketing Automation solution encompassing B2B marketing & lead management, Email & campaign management, Personalization across channels and marketing Budget & calendar Plan." wikipedia.org

A set of APIs that enable users to send, receive and track email from app on Python, Ruby, PHP, C#, Node.js or Java.

Short Message Service (SMS) is a text messaging service component of phone, web, or mobile communication systems, using standardized communications protocols that allow the exchange of short text messages between fixed line or mobile phone devices. wikipedia.org