The HITS algorithm for ranking pages uses Hub and Authority scores to
rate each page. Hub scores are given to pages that point to other
pages with high authority scores. Authority scores are given to pages
that are pointed to by reliable hubs. Through iterations, these scores
increase for each page, then after several iterations, those pages
with high authority or high hub scores are presented. Presenting both
authorities and hubs increases the likelihood that one of the first
few results will be useful.