This e-portfolio comprehensively examines various aspects of e-business, including e-commerce, marketing, and retailing. It starts with the building blocks of an e-commerce presence, encompassing mission statements, strategic analysis, business and revenue models, target audiences, market characteristics, development timelines, budgets, and site management tools. The portfolio then delves into e-commerce security, payment systems, and business strategies such as value propositions, revenue models, market opportunities, competitive environments, and advantages. Further sections cover e-commerce marketing and advertising, exploring internet audiences, consumer behavior, and marketing tools. The portfolio also addresses social, mobile, and local marketing, outlining online platforms, marketing tools, and mobile marketing campaigns. Finally, it analyzes e-commerce retailing and services, evaluating the viability of online firms, challenges faced by retailers, and trends in online financial, travel, and career services, concluding with an overview of on-demand service company business models. The portfolio draws on various academic sources and real-world examples to provide a well-rounded understanding of the subject.