As a marketer, I always question the wisdom of organisations coming up with their own ‘categories’ or catch-phrases because, as a general rule, there are more than enough of them, and making new ones stick is risky and expensive. But, despite the fact that the advice of my SEO consultant is that it might take a year or more before anyone searches Google for ‘earned data’, I still think it’s worth the investment. And here’s why.

Third party lists have been the bedrock...