Digital marketing is the marketing of products or services using digital technologies like the internet, mobile phones, and display advertising. It is cheaper than traditional marketing, allows for more specific targeting of audiences, and has the potential for global reach. Digital marketing techniques include search engine optimization (SEO) to increase visibility on search engines and social media optimization (SMO) to generate publicity and awareness through social media platforms like Facebook, Twitter, and blogs. SMO aims to optimize websites and content so it encourages users to share links across social networks.