Behavior criteria define a group of persons for which the algorithms have identified a common behavior. These common behaviors are identified by Facebook thanks to factual information principally tied to connectivity and to the data collected directly from applications published by the Facebook group and or the web browser used. Some examples of behavioral criteria: frequent travelers, 4G connection, commuters, Console gamers, Engaged shoppers, Expats, Facebook Payments, Facebook access (mobile/desktop).(For more information: https://www.facebook.com/business/ads/ad-targeting )