The development of information and communications technologies, in particular the development of the Internet, has had a significant impact on the functioning and business activity of numerous organisations. For many years, we have been observing development of e-commerce, where various forms of relationships between suppliers and customers occur. Creation of new forms of cooperation and implementation of business, social and economic activities have an impact on customer behaviour and determine their conduct. The aim of this paper is to characterise selected aspects connected with purchasing goods and services online. It presents results of the author’s studies connected with making decisions about the purchase of goods and services online.