Remarketing with Google Analytics lets you use Google Analytics to re-engage with site visitors who show an interest in your products and services. Build lists of visitors using GA dimensions and metrics (location, visit duration, etc) -- for example, visitors who spend time viewing specific pages or who put items in their shopping cart. Then run remarketing ads on the Google Display Network that your visitors will see as they browse the web. This feature helps advertisers to create the most relevant ads and reach the right users.