The document discusses personalizing a website for a company's number one customer to increase sales. It provides steps to identify the number one customer based on data like location, interests, needs and demographics. The example shown is for a luxury travel brand whose number one customer is identified as a male from New York City who likes Caribbean all-inclusive resort vacations and books trips on Mondays. The document suggests personalizing the website specifically for this customer, nicknamed John Tavenport, by highlighting offerings that meet his needs like the best all-inclusive resorts with direct flights from NYC and Monday alerts about deals.