Remarketing is based on the collection of user data . The main sources of this data are cookies and tracking pixels . With the information collected in this way, the company can accurately determine what actions users perform on the site.
In practice, when a user visits a website and browses products or services, they leave a digital footprint. Remarketing involves using these footprints to offer personalized advertising when the user browses other websites or uses social media.
Facebook Pixel
The Facebook pixel performs a number of key tasks to help you market effectively on Facebook. It is an extremely useful tool for reaching the right audience.

One of the main tasks of the Facebook pixel is remarketing. It allows us to target people who have already interacted with our website or social media profile. This means that we can target ads to users who, for example, have visited our website, added a product to their basket, but have not completed the transaction. With the knowledge we gain about these behaviours, we can create personalised ads, for example with a promotional code, to attract users back to our site and encourage them to make a purchase.