Gathering user research & insight is at the very heart of a user-centric design process. From a business perspective, we can deliver what we think users may want and need, but the only way to truly know is to gather that insight directly from users.
We can do this in a number of ways: gathering current site activity through stats, 1:1 or group interviews with customers, surveys, call centre feedback analysis, talking to sales teams, seeing what compeititors offer. Gathering as much insight as possible is an essential part of the discovery process.