What type of custom audience would be MOST effective for re-engaging users who viewed a product page but did not add the item to their cart?

A website custom audience specifically targeting users who viewed a product page but did not add the item to their cart is the MOST effective for re-engagement. This audience focuses solely on individuals who showed specific interest in a particular product but didn't take the next step of adding it to their cart, indicating a high potential for conversion with the right incentive. For example, you could create a custom audience in Facebook Ads Manager by setting the rule to include users who visited a specific product page URL but excluding those who triggered the 'AddToCart' event within a defined timeframe, such as the last 30 days. This ensures that your re-engagement ads are shown to users who were clearly considering the product but didn't finalize their decision, making them more receptive to targeted ads that remind them of the product or offer an incentive.