“…In the 84 articles selected, different systems are mentioned, These systems can be classified using the classifications presented in the articles by Ardissono, Azuma, Bekele, Milgram, and Čopič [10,11,14,50,51] along with the categories motivation, content co-creation, and type of adaptation ( Figure 3). Motivation, content co-creation, and type of adaptation were considered and included As the articles by Rozo, Olson and Silva [47][48][49] mention, it is important to define the main research questions for a literature review. To do so, the aspects that the researchers want to answer must be taken into consideration.…”