This document provides an overview of digital marketing, including definitions, key components, and tools. Digital marketing is the marketing of products or services using digital technologies on the internet and mobile devices. It consists of search engine optimization (SEO) to increase search engine rankings, pay-per-click (PPC) advertising, social media marketing (SMM) to generate engagement and shares, and content writing for websites. The goals of digital marketing are to reach the right audience, engage users, and maximize return on investment (ROI). Measurement of digital marketing effectiveness is also discussed.