One or more server devices may receive an indication that a particular user has accessed a particular document. The one or more server devices may determine whether the particular document has been flagged as needing comments, and retrieve an author likelihood score for the particular user when the particular document has been flagged as needing comment. The one or more server devices may determine whether the retrieved author likelihood score is greater than a particular threshold, and provide a suggestion to the user to write a comment about the particular document when the author likelihood score is greater than the particular threshold.