1. A method comprising: receiving user behavioral data for search results of a search query, the user behavioral data comprising clickstream data indicating that a user selected the search results including an untagged item and a plurality of tagged items during a single search event; determining that the selected plurality of tagged items corresponds to a first type of metadata and the untagged items are selected during the single search event that includes the plurality of tagged items, the selected plurality of tagged items transgressing a threshold number of selected tagged items that corresponds to the first type of metadata; identifying, by a machine having a memory and at least one processor, the untagged item as a candidate to be tagged with the first type of metadata corresponding to the tagged items based on the determined plurality of tagged items corresponding to the first type of metadata and transgressing the threshold number of selected tagged items; and assigning data corresponding to the first type of metadata for the tagged items to the untagged item in response to the identifying the untagged item as the candidate to be tagged with the first type of metadata.