3. A method comprising: determining, via one or more computing devices, that a tag is logically related to a particular tag, the logically-related tag being associated with one or more first items in an electronic catalog and the particular tag being associated with one or more second items in the electronic catalog, wherein the determining comprises (1) analyzing the particular tag and the logically-related tag to determine one or more common root words, or (2) analyzing grammatical variations of the particular tag or the logically-related tag; determining an overlap between the one or more first items associated with the logically-related tag and the one or more second items associated with the particular tag; presenting the logically-related tag to a user to enable the user to vote to merge the logically-related tag with the particular tag at least partly in response to the overlap being greater than a first value but less than a second value; and providing a suggestion to the user to provide input to merge the logically-related tag with the particular tag at least partly in response to the overlap being greater than both the first value and the second value.
3. A method comprising: determining, via one or more computing devices, that a tag is logically related to a particular tag, the logically-related tag being associated with one or more first items in an electronic catalog and the particular tag being associated with one or more second items in the electronic catalog, wherein the determining comprises (1) analyzing the particular tag and the logically-related tag to determine one or more common root words, or (2) analyzing grammatical variations of the particular tag or the logically-related tag; determining an overlap between the one or more first items associated with the logically-related tag and the one or more second items associated with the particular tag; presenting the logically-related tag to a user to enable the user to vote to merge the logically-related tag with the particular tag at least partly in response to the overlap being greater than a first value but less than a second value; and providing a suggestion to the user to provide input to merge the logically-related tag with the particular tag at least partly in response to the overlap being greater than both the first value and the second value. 4. A method as recited in claim 3 , wherein the determining of the logically-related tag further comprises determining that users who searched for the particular tag during a particular session also searched for the logically-related tag during the particular session.