Web 2.0 Consulting

While developing a social networking site its a must to understand your user.

So who do you approach ? what is the right way to understand him ? Can you search for more data on his web habits ?
Is there a way you can review and analyze it ?

Well all this remarks are about designing the right user interface with the right flow and the right process.
As you all know user interface is the way we understand our users, from the registration form to the uploading of the content we are committed to give our users the best way and the easiest one.