The document discusses e-commerce business models and their application to online grocery. It begins by defining e-commerce and exploring the customer engagement cycle from discovery to experience. It then examines different e-commerce fulfillment models like inventory-led, drop-ship, marketplace, VMI, and hyper-local. Challenges of online grocery are also discussed due to factors like many items per order, perishability, frequent price changes, and need for fast delivery. The case study of Salt n Soap is presented, which uses a "shop and drop" hyper-local model for its online grocery business.