PROVIDING CONTEXTUAL DATA FOR SELECTED LINK UNITS

Link units include a keyword or words that, when selected, cause a client device to display a landing page having one or more content items related to the selected link unit. The use of contextual data in addition to the keyword or words of the selected link unit may further assist in selecting relevant content items to populate the landing page. The contextual data may include the unselected keyword link units and/or other keywords in a group from which the selected keyword link unit was selected. The contextual data may include assigning weights to the selected keyword link unit, the unselected keyword link units, and/or the other keywords in the group from which the selected keyword link unit was selected. The group may be identified using a unique token associated with the group and the selected keyword link unit.