1. A method comprising: retrieving multiple messages from a social networking service, the messages containing multiple trending topics; for each respective trending topic of the trending topics, determining a trending speed and a trending acceleration of the respective trending topic at a time point; and presenting a treemap including multiple shapes; wherein each respective shape of the shapes is associated with a corresponding trending topic of the trending topics, an area of the respective shape indicates a trending speed of the corresponding trending topic at the time point, and a property of the respective shape indicates a trending acceleration of the corresponding trending topic at the time point.