From the developer's perspective, good information design is important because it allows you to address priorities, which ideally include user need. Establishing what users are most likely going to want or need, and using information design to facilitate them doing that as easily as possible builds trust and affinity with the users. Respect the User. Although a site should undergo extensive user testing before launch, that's not always possible. Review site logs.
Most sites have a path that a user is inclined to follow.
The first pages in that path are likely to get more page views than the deeper ones. If that's not happening, something's wrong. Also, interactive features or forms often have pages that are error messages. If these are getting an unusual number of page views, again, something's wrong. It might be technical, or it could be that the interface just isn't working for users.