Techniques to allow a social networking system to provide hints when a user tags an image. In one embodiment, a comment associated with an image to be tagged by a user of a social networking system is received. A hint based on the comment that is suggestive of at least one aspect relating to the image is identified. A set of candidate tags associated with the user is determined. At least one suggested tag from the set of candidate tags is selected based on the hint. The at least one suggested tag is provided for the user to potentially tag the image.