Personalized marketing — the product pitch or message that really hits its target, the right person at the right time — is the much-discussed ideal in advertising and sales.

The truth is that personalized marketing is, well, mostly marketing today. With modern tools of data analysis, it is becoming increasingly possible to identify customer groups in smaller segments than the big demographic buckets of the past, which filtered by age, gender, income and place of residence. But smaller audiences are still a long way from personalized marketing.