What factors make any social media campaign a success?

At its very core, social media success is about having great content and knowing where and when exactly to share it.

It completely depends on your targets.
But a general factor would be: Interactions, that's what social media all about; communication.

When it creates a buzz beyond control

Hello, This is a great question and one that most social media/digital marketing people struggle with.
I would say that the following factors have a lasting impact on a social media campaign: - Relevance to the brand - Connect with audience - Consistency of messages - Ability to fulfill a need - Continuity of communication If you need social media guidance/training and support I will be happy to help.
You can look up my website www.intraskope.com or my blog www.intraskope.wordpress.com