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I don’t like pie charts. 
Why? Because if you are anything like me, they are hard to understand when they are used poorly, and 99% of the time they are used poorly.
But why should you care?
Because if you have gone to the trouble of providing some mind-blowing insight to your board, then presented it in a poor way, it is unlikely to be read or understood and even if you try to make amends and artfully talk to those baffling visuals, your audience is likely to spend most of their time staring at third-eye visuals (doodling on them) and not hear your important stories and your critical calls to action.
So please learn visualisation best practice today, it will be a game changer, and take yourself off the business risk register.