Maybe it's a phone on a bus, or a tablet in a store or the laptop on your coffee table. Maybe you're wearing it on your wrist or over your eyes. Whatever it is, it knows who you are, where you are and the best way to reach you at any moment.
That may seem a little creepy until you consider you bought those devices to get helpful information, and in order to help you, they need to know the who-where-when-why of what you're all about. Of course, marketers want that info, too.
In the parlance of Melissa Parrish, this makes you "addressable," and it's transforming the very nature of marketing. About half of US online adults are now "always addressable," she says, and the number is rising oh-so rapidly.