Unless you are in the marketing business (or employ someone like myself), the word “segmentation” will provoke two reactions;
A: I don’t know or
B: it brings you out in a cold sweat as it means reviewing that tangled web you have made of your email list.
The cure for both conditions is to start thinking of your audience, as you would do the school playground – as a five-year-old child! Are you ready to start smiling? And getting a better reaction from your readers?