Online shoppers are more distracted than ever. As the count of e-commerce and comparison shopping sites on the Internet expands daily, an e-retailer’s job of attracting and retaining customers becomes even more difficult. This fierce competition online has left online retailers grappling with how to convince shoppers to buy at their site over competitors’. Fortunately, there are strategies online retailers can use to reach their most valuable customers — and it all starts with using a resource all retailers have, but few understand: their own customer data. For most retailers, the prospect of figuring out how to tap the stream of anonymous but valuable data shoppers leave behind is overwhelming. Most have difficulty making sense of the data, and most analytics teams are already overwhelmed with staying on top of site analytics alone. Customer data, rich with the information retailers need to determine the “value” of each visitor -- which products they looked at, how much they’ve spent in the past, how interested they are in purchasing now -- simply lies buried somewhere in a data warehouse. But not investing in its use is a big mistake because the opportunity cost is high. For example, making sense of customer data is crucial to extracting more revenue & profit from retargeting campaigns. If the data shows that a shopper is highly likely to purchase, the retailer can react by showing that shopper relevant, personalized display ads, at the right time and on the right sites. If the data shows the shopper frequently browses but can’t be persuaded to purchase, there’s little sense wasting time and marketing resources to appeal to them. New advertising technologies, namely real-time bidding, and the emergence of data-driven advertising technology vendors, can assist retailers in analyzing & acting upon this valuable, but often unused, data. Performance retargeting, driven by retailers who make use of the anonymous trail of data their customers leave behind, has changed how everyone (publishers, advertisers and even consumers themselves) connects online. From the consumer’s perspective, these data-driven ads make for a smarter, better shopping experience. No more generic ads for products they’re not interested in. No more ad spam. With minimal effort, and with the help of advertising technology partners, advertisers can put their own customer data to work as one of their biggest online marketing assets.