1. A method comprising: receiving, via a computer network, data streams from a plurality of network servers, the data streams being associated with user activities performed across the plurality of network servers in relation to one or more computer-based services provided to users on the plurality of network servers; analyzing, by a computer, the received data streams, said analyzing including identifying a plurality of topics frequently occurring in the user activities, and a relevancy score for each topic of the plurality of topics, the relevancy score representing a relevance of each topic in relation to each of remaining topics of the plurality of topics; causing a computer display to present a radial arrangement of the plurality of topics, wherein the radial arrangement includes a plurality of nodes, each node representing one topic of the plurality of topics; wherein causing the computer display to present the radial arrangement of the plurality of topics includes: causing a center node to be presented at a center of the radial arrangement, wherein the center node represents a main topic including any of a selected topic submitted by a user of the computer or a default topic; and causing a first subset of nodes of the plurality of nodes to be presented at a radial distance from the center node, each of the first subset of nodes being presented as connected to the center node, wherein the first subset of nodes represent a first subset of topics, from the plurality of topics, having a first set of relevancy scores in relation to the main topic that exceed a first threshold.