Hey buddy, have you heard about Public affairs industry before?
No! I sure haven't! What the public affairs industry?
Ok, it is the building and development of relations between an organization and politicians, governments and other decision-makers.
That's really interesting! What else can you tell me about public affairs?
It has evolved over the years as it is considered a branch or sub-discipline of public relations (PR).
Oh, I see! That would be a great career to get into! 
Well, it is. However, it is often equated with lobbying