In the rapidly evolving digital era, businesses and organisations must adapt to technological changes and changing consumer behaviour. One important aspect in dealing with these changes is the use of e-marketing strategies. The purpose of this study is to analyse e-marketing strategies and their effect on revenue and customer loyalty. This research is a literature review that adopts a qualitative method approach, which means it will analyse and interpret data by relying on information and text from various sources. The study results show that electronic marketing, or e-marketing, is a key element in the marketing strategy of modern companies. It is supported by advances in information and communication technology that have changed the way businesses operate. E-marketing has a significant influence on a company's revenue by increasing visibility, attracting new customers, and retaining existing customers. In addition, this strategy can also strengthen customer loyalty and help companies make smarter decisions through data analysis.