What is Brainstorming?
Brainstorming is a group technique formalized by Alex Osborn in 1939 as a way to generate a lot of ideas quickly in response to a specific problem or question. Traditional brainstorming involves multiple people calling out as many ideas as they can think of within a set timeframe. Brainstorming emphasizes quantity over quality, disallowing critique or limitations during the brainstorming session; "There are no bad ideas."
Research on Brainstorming over the past few decades has discovered problems with the original technique. Now, most experts recommend using a variation on the original brainstorming technique designed to overcome these challenges.