What is meant by Remarketing?

Remarketing also known as retargeting. It is the tactic of serving targeted ads to people who have already visited or taken action on your website. In terms of technical execution, remarketing is the process of using a javascript tag known as a pixel to place a cookie in the user’s browser. The cookie then informs a remarketing platform to serve specific display ads through an ad exchange, based on the pages or products the user has engaged with or searched for on your website or app. can be used to promote a specific product or offering, or to achieve a certain conversion goal such as lead generation. In eCommerce, for example, remarketing ads can be used to recover abandoned carts, by displaying the product the user added to the cart but left the site without purchasing. 
Some Benefits of Remarketing

• Remarketing not only reminds visitors of their desire to engage with your brand but can facilitate the transition to the next step of the conversion funnel. If a user has left a product page, for instance, the remarketing ad can be presented to them immediately, leading the user back to the product page where they can be incentivized to move to the next stage of the funnel—adding the item to cart.
• Remarketing ads can be personalized to fit the preferences and needs of each user or to specific customer segments. This can be done through the use of dynamic ads, which automatically adapt content and promotions specifically to each user and ensure they are exposed to the most relevant creative.
• You can reach people on your remarketing lists across their devices as they browse over 2 million websites and mobile apps.
• You can show your ads to people who’ve previously interacted with your business right when they’re searching elsewhere and are more likely to make a purchase. You can also help customers find you by showing them your ads when they are actively looking for your product on Google Search.