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 engage audiences, and content writing for websites. Measurement of digital marketing efforts and return on investment (ROI) is also discussed. The goals of digital marketing are to reach the right audiences, engage users, and motivate actions while maximizing ROI.