Methods, systems, and apparatuses, including computer programs encoded on computer-readable media, for receiving information regarding a plurality of conversion paths. Each conversion path includes one or more user interactions, corresponds to a user, and ends with a conversion interaction. A list of channel groups is received. Each channel group includes a name and one or more group rules that refer to the characteristics of one or more user interactions of the plurality of conversion paths. Each user interaction in the plurality of conversion paths is grouped based upon the list of channel groups. A selection of channels to visualize is received and for each of the selected channels to visualize the user interactions are aggregated based upon the channel group of the user interaction and a position of the user interaction within the conversion path. Information regarding the aggregated user interactions for each of the selected channels is provided.