Remarketing is an advertisement process in which we target the audience who is either our old customer or have ever shown interest in the website. The chances of conversion from this audience are quite high rather than targeting a random audience.
The process of remarketing is also known as re-targeting. The method involves showing the previous customer’s relevance ads when they visit any website on the Google Display Network. Reason for remarketing is, it is easy to convenience your old customers from advertisement because they already have trust in your brand.
So, remarketing increases the ROI as far as PPC campaigns are concerned about taking advantage of the lost visitors and turning them into the customers.