Good and short description, but it's only a little part in digital marketing. This is just retargeting, an old hat. You can do even more sophisticated things,

Good and short description, but it's only a little part in digital marketing. This is just retargeting, an old hat. You can do even more sophisticated things, like predicting what's the best next step in the sales funnel. In general, every step you take before you purchase online is recorded to build your customer journey. And there's a lot more data, like referrers, user agent, times and so on.