When I remarket to those people who already visited my website, suddenly I have the benefit of several things: 1. Repeat impressions. The more often that someone sees your ad, the likelier they are to book. You get that somewhat with PPC ads, but it is diluted. If you use remarketing, however, you specifically target the people who have already been to your website, and you could make it based on viewing a particular page, such as a property that you rent to travelers, or your reservation page. 2. Focus. Your ads are shown to people who already expressed some level of interest in what you have to offer, not just to people who have put in certain keywords into a search engine. 3. Specific Ads for Specific Desires. You can display ads targeted at what the traveler is looking for. If you know that they are coming for a specific event, like Spring Break, you can choose that ad to display to them. Get the full story at Blizzard Internet Marketing Part 1, Part 2, Part 3