The assignment discusses the challenges faced by a business, specifically Tesco, when using the internet as a marketing tool in a globalized market. The main challenges include disintermediation, payment security, and meeting customer expectations. Disintermediation refers to the elimination of middlemen, which can lead to increased efficiency but also disrupt traditional channels. Payment security is a concern for consumers who are wary of online transactions due to hacking and identity theft. Meeting customer expectations requires businesses to be available 24/7, provide personalization, price transparency, reliability, responsiveness, convenience, and speed in their online interactions.