To get an idea of how popular a new product is likely to be, you need to take a sample of the target market. But what's the best way to go about doing that?
Well, one option is cluster sampling. With this method, you divide the population into groups (or 'clusters') and then select a sample of those clusters. It's a bit like going into a crowded bar and trying to gauge people's opinions by chatting to a group of friends.
Sure, they might not represent everyone in the bar, but they'll give you a good idea of the general mood. And that's what cluster sampling is all about: giving you a quick and easy way to gather data that you can use to make informed decisions.

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