The promotion of products and services of brands by using digital technologies.  According to Wikipedia, this method of marketing includes the use of mobile phones, display advertising and any other digital medium.

The process of using these various mediums can be done by way of search engine optimisation, search engine marketing, content marketing and various other types of techniques using digital marketing, internet and any other non internet channels such as SMS and MMS.

It is time to get to know this medium of marketing if one is not familiar with it.  This is going to a space where learning can be leisurely and interesting.