Determining what kind of concession is best for each location, and what size it should be, are keys to its success. How people at airports use concessions is strongly influenced by their time, individual human natures, and the way they feel at the moment. Some people are worried, some are relaxed. Some visit, walk around, work quietly or play while they wait. Some don't have enough time to do any of these things, but must buy something anyway.
Many passengers are anxious about the security checkpoint.
Others wish to say good-bye before they pass security, using concessions first, then go on alone to their gate. These people find comfort by hurrying to their departure gate, seeing for themselves the status of their flight, then returning to concession areas to spend their time. When this is the case, concession locations and types must adjust to this particular cultural trait. International airports, in particular, encourage passengers to check in early and pass through departure controls quickly, not only to avoid departure delays, but to maximize passengers' time in the airside concessions areas. Almost all people, except the most hurried, can be enticed to buy something, especially if the price is right, and some passengers seek out the opportunity to spend.