Tourism marketing is different because the customer purchases a series of services, but is left with very little concrete value at the completion of his trip. As a result, the marketing initiatives have to emphasize the value of the memories, make the collection of services easily accessible and add value through additional programming and other factors. A key challenge is to convince potential customers that the item they are purchasing provides good value for the price, and that the services will be as described and expected. The eight P's of marketing tourism summarize the special approach that is required. Many small businesses market tourism products and employ these marketing strategies.