Defining them may involve acknowledging uncomfortable truths. A good health advice site can aim to reassure, or restore confidence. Perhaps you'd like sick people to feel that their problem is taken seriously, or healthy people to understand what it's like to have that illness. Figure out what your users are feeling, and give them what they need. Remember that outsiders influence online descision-making.
Children pester parents for particular toys or groceries.
Or users may want to discuss ideas for holiday destinations with friends or family. How People Really Use Sites Think about the characteristics of the interaction the user has with a site. The goal of every designer and developer is to attract a large, regular audience, who are also perhaps regular purchasers, to their site. But this isn't usually realistic. By understanding how people are likely to interact with your site, you can gauge what opportunity you have to create the right impression.