What is remarketing feature in adword?

Many interview put up the question .

Remarketing-Remarketing is a feature that lets you reach people who have previously visited your site, and show them relevant ads across the web or when they search on Google. When people leave your site without buying anything, for example, remarketing helps you connect with these potential customers again. You can even show them a tailored message or offer that will encourage them to return to your site and complete a purchase.

1-Remarketing is a feature of interest-based advertising that helps you match interested people with the right message.

2-Even if people leave your site without making a purchase, remarketing lets you reach out to these potential buyers when they search on Google using your keywords, use Google products like Gmail, or visit other websites. You can show them a compelling message or offer that will encourage them to return to your site and complete a purchase.