SummarySocial media is assuming a crucial role in purchasing decisions, and most companies are using social media for marketing. Making sense of the unstructured information content shared by users along the time is an emerging challenge. We advise that the dynamic nature with which trends and user's interests evolve along the timeline requires the revising of well-assessed methods to address, for instance, recommendation provisioning, information retrieval, and so on. ie, Twitter. 6 In particular, we advise that time awareness is crucial to more effectively estimate user's interests, and thus, to better address social media marketing improving "vanity metrics" of likes and shares that in social marketing remain the most commonly used measures for evaluating success on social media attempting to increase traction, for instance, posting the right message at the right time.Problem. Let us consider a timestamped tweet stream = {tw 1 , … , tw n } in the time window starting at time t s and ending at time t e , and let us suppose topics corresponding to the content of each