Digital marketing is the marketing of products or services using digital technologies like the internet and mobile phones. It includes techniques like search engine optimization (SEO), search engine marketing (SEM), social media optimization (SMO), and social media marketing (SMM). The goals of digital marketing are to increase visibility, reach the right audience, generate leads, inform customers, engage audiences, motivate action, generate traffic, maximize return on investment, and convert sales. SEO involves optimizing websites to rank higher in organic search results, while SEM uses paid advertisements. SMO optimizes websites for sharing on social media, and SMM actively shares and publicizes content on social channels.