Retargeting or remarketing is an area of digital marketing that has shown explosive growth in the last few years, being offered by more and more online display ad networks. This service lets a business market to people who have visited its website using online tracking by placing a small text file or cookie in that person’s browser. The ad networks then place ads relating to the company or its products on unrelated sites the person visits. The concept is that these visitors have expressed active interest in a company’s products or services by visiting its website and therefore are strong  ...