Well, isn't it obvious? During cold war, countries were being pressed to join either of the blocs, but NAM provided a barrier against this pressing, when countries unanimously agreed to stay neutral and share the opinion.
Due to its nature, that whatever was happening, was on a diplomatic behind closed doors basis, where discussions were being held about stances hiding it from both US and USSR bloc, it is very hard to trace, what they really did, and how they did it. But, with a attendance of 55% or 115 countries, you cannot rule it out as just another organization.
EDIT: http://mealib.nic.in/?2029
please check out this official foreign policy extract from 1983, it was a big event in world politics. reading only the Introduction will let you know.