This report provides a comprehensive overview of Search Engine Marketing (SEM) within the context of digital marketing. It begins with an introduction to digital marketing, emphasizing the role of SEM in enhancing website visibility through paid advertisements, and its integration with SEO. The main body delves into SEM's core components, including impressions, clicks, CTR, and conversion rates. The report highlights the importance of SEM for both small and large businesses, focusing on its conversion-focused nature, brand awareness improvement, and ability to generate leads. The report explains how SEM works, using examples of paid search results, and outlines the factors affecting SEM, such as keywords, canonical tags, and email campaigns. The report also examines the working method of advertisers, including keyword selection, geographical targeting, and ad creation. The conclusion reiterates SEM's effectiveness in a dynamic business environment, emphasizing its role in online advertising, and its potential for business growth by reaching wider markets and increasing the customer base through targeted advertisements.