Retargeting ads are online advertisements shown to users who previously interacted with a website or online content. Retargeting ads work by using cookies to track a user’s browsing behavior then displaying relevant ads based on their past actions. Retargeting ads help businesses to stay top of mind with potential customers and encourage them to return to a website to make a purchase. At trade shows, retargeting ads can be a tool for businesses looking to reach tradeshow booth visitors later on to boost their sales revenue.