I heard that each airplane wing has like a sort of Camber on the wings (curves). Does this make the plane fly better?
Two types of lifts: Dynamic Lift, Induced Lift.
I agree that a Dihedral is an upward bend angle of the wings to help the plane fly straight and level...True? I think so.
Camber of the wings is mostly what allows most aircraft to fly(there are exceptions). ➡ http://en.wikipedia.org/wiki/Camber_%28aerodynamics%29
Dihedral adds the the lateral stability of an aircraft, so yes.
If what you are talking about are those bent wing tips you now are seeing everywhere, those are called "fourelles" I believe - or something that sounds like that. They have been found to increase fuel economy up to 3%. They help eliminate wind flow irregularities which cause drag.