Digital marketing consists of various online marketing tactics used to promote products and services on the internet. It includes search engine optimization (SEO) to improve organic search rankings, social media marketing (SMM) to build relationships and engage customers, social media optimization (SMO) to streamline websites for sharing, pay-per-click (PPC) advertising, email marketing, and affiliate marketing. Digital marketing allows for global reach, targeted campaigns, measurable results, and often lower costs compared to traditional offline marketing.