Simply said, it is marketing done digitally. Sales via the internet across digital platforms. Digital marketing is advertising delivered through digital channels. Channels such as social media, mobile applications, email, web applications, search engines, websites, or any new digital channel. Digital marketing developed mostly during the 1990s and 2000s and has changed the way brands and businesses use technology for marketing. Digital marketing is that aspect of marketing that employs the internet and online-based digital technologies such as computers, mobile phones and other digital media and platforms to promote products and services. Actually, digital marketing extends to non-Internet channels that provide digital media, such as television, mobile phones (SMS and MMS), callback, and on-hold mobile ring tones. The extension to non-Internet channels is what differentiates digital marketing from online marketing. In the age and era, digital platforms are becoming increasingly incorporated into marketing plans and everyday life, and as people increasingly use digital devices instead of visiting physical shops, digital marketing campaigns have become prevalent. Consequently, digital marketing employ combinations of search engine optimization (SEO), search engine marketing (SEM), content marketing, influencer marketing, content automation, campaign marketing, data-driven marketing, e-commerce marketing, social media marketing, social media optimization, e-mail direct marketing, display advertising, e-books, and optical disks and games have become commonplace.