Now that you know more about the users, it is pretty useful to create personas, which are archetypes representing your target or your client's customer, who is going to use your product or service, who we are designing for. As pointed out by UXBooth, a persona is a fictional character to remind us who our users are and it should have its own story. It is important that the story is good enough to make us believe it, so the more accurate this representation, the more likely our decisions will reflect the users' needs.
Although creating personas seems like a simple technique, you can be sure that it is a very powerful tool widely used not only by UXers, but also by marketers, designers, product developers, and other professionals ...