A computer method and apparatus of social tagging computer resources is disclosed. In the invention method and apparatus, a data store holds social tagging data of previously followed tags throughout a system. In response to end-user indication of a tag candidate, the invention system retrieves from the data store social tagging data about the tag candidate. A tag previewer forms and renders a display of the retrieved social tagging data. The display indicates number of users having interest in (i.e., having followed, searched with, browsed and/or subscribed to) the candidate tag and its variants, and the type of interest. The display may further indicate identities (e.g., email addresses) of these users having such interest. The display may serve as a precommit preview to the end-user during selection of a tag (the candidate) for a given resource. Alternatively, the tag previewer may provide the invention display of social tagging data during end-user browsing as well.