Remarketing allows businesses to retarget people who have visited their website by showing them ads across the web. It works by creating remarketing lists of visitors and building ad campaigns that target those lists. Remarketing helps reconnect potential customers who left a site without buying by showing them tailored messages to encourage returning. Both large and small businesses can benefit from remarketing to drive sales, registrations, or brand awareness by getting a return on their advertising investments. Google remarketing specifically allows advertisers to reach customers when they are most likely to buy through customized audiences at large scale and efficient pricing with easy ad setup and visibility.