To use LOVOO, you first need to create a user profile with all of the photos and personal information that you see fit to include. This profile is visible to other users, so that they can view it and decide whether or not to contact you. That means that you can browse through profiles from all of the members of the network, choosing who you like and who you don't.
The main 'problem' when it comes to using LOVOO is that to view the profile of any other user, you need to spend points. These points are obtained by opening the app every day, or by upgrading to a VIP account, which naturally costs money. Basically, you can't just browse freely across the network - you'll want to choose wisely which profiles to view.
LOVOO is a good social tool, thanks to which you'll find it easier to find a date, hook-up, friend, or whatever it is you're looking for.