Display advertising can be an effective alternative to search advertising by using data-driven targeting and retargeting strategies. Retargeting analyzes site visitors and targets them with personalized ads across the media network. This improves key metrics like direct traffic, organic searches, click-through rates, and gross sales. Retargeting is ideal for testing with a budget of 30,000 clicks for 3 months for sites that receive 10,000 daily unique users. It allows continuous optimization of campaigns based on cost-per-acquisition and other goals.