According to data from the US marketing agency Deep Focus, four out of every ten millennials would rather engage with pictures than read.

What? They’re suggesting that the most educated generation in history would rather look at the pictures you’ve just texted to them than read what you’ve written?

Apparently so.

I’m willing to bet that a great many people read that first paragraph and thought, hang on, what’s a millennial? It’s someone young isn’t it? Definitely younger than a baby boomer…

So before we go any further, here’s a guide to millennials, boomers and every other group that might be important to your business:

Maturists were born before 1945: they’re the generation of rationing, rock n’ roll and defined gender roles – particularly for women

Baby Boomers – 1945/1960: the Cold War, the Swinging Sixties, moon landings – and now very much family oriented

Generation X: born between 1961 and 1980, they’re marked by the fall of the Berlin Wall, Thatcher, Reagan and Gorbachev, early mobile technology – and the divorce rate rises

Millennials/Generation Y – 1981-1995: 9/11, social media, the invasion of Iraq – and the generation that has produced many of our digital entrepreneurs

And finally, Generation Z: born after 1995 they’ve been brought up with global warming, the economic downturn, cloud computing and WikiLeaks.

These terms are largely American, but the marketing message they bring with them is every bit as relevant in the UK.

Knowing your customer has always been important, but today it is more important than ever. You can reach a far wider geographical audience – and you can also target a specific niche much more precisely: the analysis and market segmentation that’s almost instantly available now (and which is very often free on social media) is something you have to use.

You also have to communicate with that audience in the right way – which brings us full circle to four in ten Millennials preferring pictures to words. You have to know your audience, and you have to know the story they want to hear.