This textbook covers the basics of business-to-business (B2B) eCommerce, where similar principles of customer targeting can be observed as in B2C eCommerce. Gerrit Heinemann highlights the specifics and business models of B2B eCommerce, analyzes the digital challenges and shows the consequences and opportunities for online sales in B2B. Recognised best-practice examples illustrate how successful B2B eCommerce can work and which risks have to be considered.