Definition of digital marketing: The marketing of products or services using digital channels to reach consumers. The key objective is to promote brands through various forms of digital media. Digital marketing extends beyond internet marketing to include channels that do not require the use of the internet.
Source: Digital Marketing Definition from Financial Times Lexicon lexicon.ft.com/Term?term=digital-marketing
Viral Marketing Campaigns can be highly successful digital marketing strategy. These are usually arranged through Digital Marketing Agencies. Check out the short video below being highly successful digital marketing campaigns ran by Art Series Hotel, Melbourne Australia that produced great ROI and global media coverage as explained.