Digital marketing, also known as online marketing, refers to advertising delivered through digital channels to promote brands and connect potential customers using the internet and other forms of digital communication such as: Search engines. Websites. Learn the fundamentals of digital marketing, and help grow your business or career with our certified course in Digital Marketing Available in online, and offline mode at our Tech Mahindra SMART Academies for Digital Technologies at Hyderabad, Mohali, and Vizag. Total duration of course is 5 months. You can join this course after 12th also.