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Deduplication is a concept that facebook defines as a process for avoiding the duplication of events; it is important to remember that CAPI works together with the Facebook pixel, meaning that each event is going to be reported by the browser and also from the server side. If you want to know more about deduplication please refer to the Facebook’s official documentation.
Let’s explain how the deduplication works with the following example, imagine we have our WFIO shop and we visit the product listing page, after the page loads we select a product from the list and we add it to the cart.
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