Remarketing:
Also see retargeting. This is a digital marketing tactic whereby an advertiser targets people who have already demonstrated interest in a product or a service. For example, if someone visits a specific product page of your website, you can use remarketing to target this person and show them a personalised ad. Your audience is tracked using Javascript code, which means the data collected remains entirely anonymous.
Although remarketing and retargeting are often used interchangeably, they actually differ slightly. According to Search Engine Journal, here are the differences: “ [Retargeting] is about moving not-yet customers down the purchase path. (...) Retargeting is really focused on paid ads (and can take a variety of forms, and target a broad range of individuals). Remarketing is focused on email campaigns and reaching out to those who have already had interactions with, allowing for more specific upselling and messaging”.
