ExoClick adds "retargeting"

From Amy @ ExoClick:

Retargeting is basically the idea of targeting specific users who have already shown some interest in a product or brand. It is generally said that about 2% of possible buyers will actually complete their purchase on the first visit. Retargeting brings back the other 98%.

It will be interesting to see how they implement this. If done the right way, retargeting can be extremely useful. On the other hand, in the past a few brokers have used the word retargeting as a euphemism for selling non-unique traffic.