Digital marketing refers to using digital channels like websites, mobile apps, social media, and search engines to market products and services. It became popular in the 1990s with the rise of the internet. Some key advantages of digital marketing are that it allows for personalization, wider reach, greater customer engagement, lower costs, and trackable results. However, it also requires skills to implement effectively across changing digital platforms. The document provides an overview of concepts, scope, advantages, and disadvantages of digital marketing.