“…In some cases, the focus is on the playful engagement, e.g., in the interactive and immersive gamification, with wearable devices and smartphones, or otherwise aimed at the user's entertainment [76,77]. In general, the common pursed principle can be defined as 'context-aware content delivery', through the definition of personalized visit paths [78,79], sometimes considering also specific physical or cognitive disabilities [58,80,81]. The tracking of visitors and their spatio-temporal visit patterns, in order to deduce their preferences and impressions, is mainly directed towards increasing the possibility of replicated visits in time, in a sort of fidelization strategy.…”