Having effective brainstorming is not only about filling a room with post-its, but selecting bright ideas that will work. So how do you summarise ideas with a solid shape without too many details? 

After you are done ideating, sometimes you end up with a wall full of post-its. Filtering those ideas can be a mess if you have to go into details and discuss every aspect of them.

There is a simple way of reasoning why this won't benefit you or the outcome of your creative session.