19. A computer-implemented method comprising: receiving a selection of a primary keyword by a customer; causing a display of a hub associated with the primary keyword on a computer display; determining a quantity related to a countable event associated with the primary keyword and each of the secondary keywords, wherein the countable event comprises an order of an item corresponding to the secondary keyword following a selection of the primary keyword by at least one customer; determining a degree of association between the primary keyword and a plurality of secondary keywords based at least in part on the quantity determined for each of the secondary keywords; and causing a display of a plurality of nodes on the computer display, wherein each of the nodes corresponds to one of the plurality of secondary keywords, wherein a characteristic of each of the plurality of nodes is determined based at least in part on the degree of association between the primary keyword and the secondary keyword corresponding to each of the plurality of nodes.
19. A computer-implemented method comprising: receiving a selection of a primary keyword by a customer; causing a display of a hub associated with the primary keyword on a computer display; determining a quantity related to a countable event associated with the primary keyword and each of the secondary keywords, wherein the countable event comprises an order of an item corresponding to the secondary keyword following a selection of the primary keyword by at least one customer; determining a degree of association between the primary keyword and a plurality of secondary keywords based at least in part on the quantity determined for each of the secondary keywords; and causing a display of a plurality of nodes on the computer display, wherein each of the nodes corresponds to one of the plurality of secondary keywords, wherein a characteristic of each of the plurality of nodes is determined based at least in part on the degree of association between the primary keyword and the secondary keyword corresponding to each of the plurality of nodes. 20. The method according to claim 19 , wherein the countable event further comprises a review of information corresponding to the secondary keyword following the selection of the primary keyword by at least one customer.