Abstract: Computer-implemented processes are disclosed for creating predictive recommendations based on large scale analysis of users tastes. One process involves detecting users tastes based on online activity and organizing these users into groups of users with similar tastes by applying graph manipulation algorithms and applying a clustering method on these graphs. Another process is disclosed for generating from these sub-graphs of similar groups of users a list of items users are most likely to show interest in based on groups' interests. A large scale solution is disclosed capable of processing large volumes of data in parallel generated from the activities of users online to create these recommendations. A system is described that takes all these artifacts to create a large scale recommendation system and collaborative filtering system. Yet another process is disclosed on how to target these groups of users with promotions through advertising networks.